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Finding the Fourth Proportional to 72,324.74, 99,807.03 and 40,494.78

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Solution

The fourth proportional to 72,324.74, 99,807.03 and 40,494.78 is: 55,882.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,324.74 : 99,807.03 = 40,494.78 : x
  2. Step 2: Convert to fraction form
    72,324.74/99,807.03 = 40,494.78/x
  3. Step 3: Cross multiply
    72,324.74x = 99,807.03 × 40,494.78
  4. Step 4: Simplify right side
    72,324.74x = 4,041,663,722.30
  5. Step 5: Solve for x
    x = 4,041,663,722.30/72,324.74
  6. Step 6: Final answer
    x = 55,882.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.