Home / 138,148,807,999.20-207,223,211,998.80-128,230,843,480.80

Finding the Fourth Proportional to 138,148,807,999.20, 207,223,211,998.80 and 128,230,843,480.80

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Solution

The fourth proportional to 138,148,807,999.20, 207,223,211,998.80 and 128,230,843,480.80 is: 192,346,265,221.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,148,807,999.20 : 207,223,211,998.80 = 128,230,843,480.80 : x
  2. Step 2: Convert to fraction form
    138,148,807,999.20/207,223,211,998.80 = 128,230,843,480.80/x
  3. Step 3: Cross multiply
    138,148,807,999.20x = 207,223,211,998.80 × 128,230,843,480.80
  4. Step 4: Simplify right side
    138,148,807,999.20x = 26,572,407,263,406,757,773,312
  5. Step 5: Solve for x
    x = 26,572,407,263,406,757,773,312/138,148,807,999.20
  6. Step 6: Final answer
    x = 192,346,265,221.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.