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Finding the Fourth Proportional to 123,670,419.80, 185,505,629.70 and 42,891,387.80

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Solution

The fourth proportional to 123,670,419.80, 185,505,629.70 and 42,891,387.80 is: 64,337,081.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,670,419.80 : 185,505,629.70 = 42,891,387.80 : x
  2. Step 2: Convert to fraction form
    123,670,419.80/185,505,629.70 = 42,891,387.80/x
  3. Step 3: Cross multiply
    123,670,419.80x = 185,505,629.70 × 42,891,387.80
  4. Step 4: Simplify right side
    123,670,419.80x = 7,956,593,902,545,897
  5. Step 5: Solve for x
    x = 7,956,593,902,545,897/123,670,419.80
  6. Step 6: Final answer
    x = 64,337,081.70

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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.