Home / 78,732,138.20-118,098,207.30-21,222,348.80

Finding the Fourth Proportional to 78,732,138.20, 118,098,207.30 and 21,222,348.80

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Solution

The fourth proportional to 78,732,138.20, 118,098,207.30 and 21,222,348.80 is: 31,833,523.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,732,138.20 : 118,098,207.30 = 21,222,348.80 : x
  2. Step 2: Convert to fraction form
    78,732,138.20/118,098,207.30 = 21,222,348.80/x
  3. Step 3: Cross multiply
    78,732,138.20x = 118,098,207.30 × 21,222,348.80
  4. Step 4: Simplify right side
    78,732,138.20x = 2,506,321,347,975,306.50
  5. Step 5: Solve for x
    x = 2,506,321,347,975,306.50/78,732,138.20
  6. Step 6: Final answer
    x = 31,833,523.20

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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.