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Finding the Fourth Proportional to 87.60, 132.42 and 87.60

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Solution

The fourth proportional to 87.60, 132.42 and 87.60 is: 132.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.60 : 132.42 = 87.60 : x
  2. Step 2: Convert to fraction form
    87.60/132.42 = 87.60/x
  3. Step 3: Cross multiply
    87.60x = 132.42 × 87.60
  4. Step 4: Simplify right side
    87.60x = 11,599.99
  5. Step 5: Solve for x
    x = 11,599.99/87.60
  6. Step 6: Final answer
    x = 132.42

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.