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Finding the Fourth Proportional to 87.88, 130.82 and 87.42

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Solution

The fourth proportional to 87.88, 130.82 and 87.42 is: 130.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.88 : 130.82 = 87.42 : x
  2. Step 2: Convert to fraction form
    87.88/130.82 = 87.42/x
  3. Step 3: Cross multiply
    87.88x = 130.82 × 87.42
  4. Step 4: Simplify right side
    87.88x = 11,436.28
  5. Step 5: Solve for x
    x = 11,436.28/87.88
  6. Step 6: Final answer
    x = 130.14

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