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Finding the Fourth Proportional to 87.51, 131.21 and 32.66

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Solution

The fourth proportional to 87.51, 131.21 and 32.66 is: 48.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.51 : 131.21 = 32.66 : x
  2. Step 2: Convert to fraction form
    87.51/131.21 = 32.66/x
  3. Step 3: Cross multiply
    87.51x = 131.21 × 32.66
  4. Step 4: Simplify right side
    87.51x = 4,284.50
  5. Step 5: Solve for x
    x = 4,284.50/87.51
  6. Step 6: Final answer
    x = 48.96

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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.