Home / 391,407,999.20-587,111,998.80-118,778,328.80

Finding the Fourth Proportional to 391,407,999.20, 587,111,998.80 and 118,778,328.80

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Solution

The fourth proportional to 391,407,999.20, 587,111,998.80 and 118,778,328.80 is: 178,167,493.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,407,999.20 : 587,111,998.80 = 118,778,328.80 : x
  2. Step 2: Convert to fraction form
    391,407,999.20/587,111,998.80 = 118,778,328.80/x
  3. Step 3: Cross multiply
    391,407,999.20x = 587,111,998.80 × 118,778,328.80
  4. Step 4: Simplify right side
    391,407,999.20x = 69,736,182,035,891,600
  5. Step 5: Solve for x
    x = 69,736,182,035,891,600/391,407,999.20
  6. Step 6: Final answer
    x = 178,167,493.20

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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.