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Finding the Fourth Proportional to 73,111.92, 109,711.62 and 67,163.28

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Solution

The fourth proportional to 73,111.92, 109,711.62 and 67,163.28 is: 100,785.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,111.92 : 109,711.62 = 67,163.28 : x
  2. Step 2: Convert to fraction form
    73,111.92/109,711.62 = 67,163.28/x
  3. Step 3: Cross multiply
    73,111.92x = 109,711.62 × 67,163.28
  4. Step 4: Simplify right side
    73,111.92x = 7,368,592,253.31
  5. Step 5: Solve for x
    x = 7,368,592,253.31/73,111.92
  6. Step 6: Final answer
    x = 100,785.10

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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.