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Finding the Fourth Proportional to 89,158.34, 132,940.40 and 86,708.90

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Solution

The fourth proportional to 89,158.34, 132,940.40 and 86,708.90 is: 129,288.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,158.34 : 132,940.40 = 86,708.90 : x
  2. Step 2: Convert to fraction form
    89,158.34/132,940.40 = 86,708.90/x
  3. Step 3: Cross multiply
    89,158.34x = 132,940.40 × 86,708.90
  4. Step 4: Simplify right side
    89,158.34x = 11,527,115,849.56
  5. Step 5: Solve for x
    x = 11,527,115,849.56/89,158.34
  6. Step 6: Final answer
    x = 129,288.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.