Home / 78,732,077.20-118,098,115.80-21,222,287.80

Finding the Fourth Proportional to 78,732,077.20, 118,098,115.80 and 21,222,287.80

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Solution

The fourth proportional to 78,732,077.20, 118,098,115.80 and 21,222,287.80 is: 31,833,431.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,732,077.20 : 118,098,115.80 = 21,222,287.80 : x
  2. Step 2: Convert to fraction form
    78,732,077.20/118,098,115.80 = 21,222,287.80/x
  3. Step 3: Cross multiply
    78,732,077.20x = 118,098,115.80 × 21,222,287.80
  4. Step 4: Simplify right side
    78,732,077.20x = 2,506,312,202,145,327.50
  5. Step 5: Solve for x
    x = 2,506,312,202,145,327.50/78,732,077.20
  6. Step 6: Final answer
    x = 31,833,431.70

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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.