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Finding the Fourth Proportional to 89,715.80, 134,426.10 and 54,549.56

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Solution

The fourth proportional to 89,715.80, 134,426.10 and 54,549.56 is: 81,734.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,715.80 : 134,426.10 = 54,549.56 : x
  2. Step 2: Convert to fraction form
    89,715.80/134,426.10 = 54,549.56/x
  3. Step 3: Cross multiply
    89,715.80x = 134,426.10 × 54,549.56
  4. Step 4: Simplify right side
    89,715.80x = 7,332,884,607.52
  5. Step 5: Solve for x
    x = 7,332,884,607.52/89,715.80
  6. Step 6: Final answer
    x = 81,734.60

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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.