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Finding the Fourth Proportional to 72,331.84, 108,414.56 and 45,326.40

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Solution

The fourth proportional to 72,331.84, 108,414.56 and 45,326.40 is: 67,937.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,331.84 : 108,414.56 = 45,326.40 : x
  2. Step 2: Convert to fraction form
    72,331.84/108,414.56 = 45,326.40/x
  3. Step 3: Cross multiply
    72,331.84x = 108,414.56 × 45,326.40
  4. Step 4: Simplify right side
    72,331.84x = 4,914,041,712.38
  5. Step 5: Solve for x
    x = 4,914,041,712.38/72,331.84
  6. Step 6: Final answer
    x = 67,937.46

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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.