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Finding the Fourth Proportional to 123,662,721.80, 185,494,082.70 and 80,616,000.80

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Solution

The fourth proportional to 123,662,721.80, 185,494,082.70 and 80,616,000.80 is: 120,924,001.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,662,721.80 : 185,494,082.70 = 80,616,000.80 : x
  2. Step 2: Convert to fraction form
    123,662,721.80/185,494,082.70 = 80,616,000.80/x
  3. Step 3: Cross multiply
    123,662,721.80x = 185,494,082.70 × 80,616,000.80
  4. Step 4: Simplify right side
    123,662,721.80x = 14,953,791,119,338,464
  5. Step 5: Solve for x
    x = 14,953,791,119,338,464/123,662,721.80
  6. Step 6: Final answer
    x = 120,924,001.20

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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.