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Finding the Fourth Proportional to 391,797,761.20, 587,696,641.80 and 119,168,090.80

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Solution

The fourth proportional to 391,797,761.20, 587,696,641.80 and 119,168,090.80 is: 178,752,136.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,797,761.20 : 587,696,641.80 = 119,168,090.80 : x
  2. Step 2: Convert to fraction form
    391,797,761.20/587,696,641.80 = 119,168,090.80/x
  3. Step 3: Cross multiply
    391,797,761.20x = 587,696,641.80 × 119,168,090.80
  4. Step 4: Simplify right side
    391,797,761.20x = 70,034,686,772,877,472
  5. Step 5: Solve for x
    x = 70,034,686,772,877,472/391,797,761.20
  6. Step 6: Final answer
    x = 178,752,136.20

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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.