Home / 81,387,672.30-122,081,508.45-75,152,097.90

Finding the Fourth Proportional to 81,387,672.30, 122,081,508.45 and 75,152,097.90

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Solution

The fourth proportional to 81,387,672.30, 122,081,508.45 and 75,152,097.90 is: 112,728,146.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,387,672.30 : 122,081,508.45 = 75,152,097.90 : x
  2. Step 2: Convert to fraction form
    81,387,672.30/122,081,508.45 = 75,152,097.90/x
  3. Step 3: Cross multiply
    81,387,672.30x = 122,081,508.45 × 75,152,097.90
  4. Step 4: Simplify right side
    81,387,672.30x = 9,174,681,474,814,078
  5. Step 5: Solve for x
    x = 9,174,681,474,814,078/81,387,672.30
  6. Step 6: Final answer
    x = 112,728,146.85

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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.