Home / 139,991,999.20-209,987,998.80-86,169,637.60

Finding the Fourth Proportional to 139,991,999.20, 209,987,998.80 and 86,169,637.60

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Solution

The fourth proportional to 139,991,999.20, 209,987,998.80 and 86,169,637.60 is: 129,254,456.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,991,999.20 : 209,987,998.80 = 86,169,637.60 : x
  2. Step 2: Convert to fraction form
    139,991,999.20/209,987,998.80 = 86,169,637.60/x
  3. Step 3: Cross multiply
    139,991,999.20x = 209,987,998.80 × 86,169,637.60
  4. Step 4: Simplify right side
    139,991,999.20x = 18,094,589,756,945,236
  5. Step 5: Solve for x
    x = 18,094,589,756,945,236/139,991,999.20
  6. Step 6: Final answer
    x = 129,254,456.40

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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.