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Finding the Fourth Proportional to 87.41, 131.69 and 72.53

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Solution

The fourth proportional to 87.41, 131.69 and 72.53 is: 109.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.41 : 131.69 = 72.53 : x
  2. Step 2: Convert to fraction form
    87.41/131.69 = 72.53/x
  3. Step 3: Cross multiply
    87.41x = 131.69 × 72.53
  4. Step 4: Simplify right side
    87.41x = 9,550.45
  5. Step 5: Solve for x
    x = 9,550.45/87.41
  6. Step 6: Final answer
    x = 109.27

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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.