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Finding the Fourth Proportional to 87,436.80, 131,446.80 and 74,606.40

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Solution

The fourth proportional to 87,436.80, 131,446.80 and 74,606.40 is: 112,158.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,436.80 : 131,446.80 = 74,606.40 : x
  2. Step 2: Convert to fraction form
    87,436.80/131,446.80 = 74,606.40/x
  3. Step 3: Cross multiply
    87,436.80x = 131,446.80 × 74,606.40
  4. Step 4: Simplify right side
    87,436.80x = 9,806,772,539.52
  5. Step 5: Solve for x
    x = 9,806,772,539.52/87,436.80
  6. Step 6: Final answer
    x = 112,158.41

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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.