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Finding the Fourth Proportional to 87.37, 130.76 and 75.49

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Solution

The fourth proportional to 87.37, 130.76 and 75.49 is: 112.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.37 : 130.76 = 75.49 : x
  2. Step 2: Convert to fraction form
    87.37/130.76 = 75.49/x
  3. Step 3: Cross multiply
    87.37x = 130.76 × 75.49
  4. Step 4: Simplify right side
    87.37x = 9,870.37
  5. Step 5: Solve for x
    x = 9,870.37/87.37
  6. Step 6: Final answer
    x = 112.98

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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.