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Finding the Fourth Proportional to 87.35, 131.05 and 29.57

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Solution

The fourth proportional to 87.35, 131.05 and 29.57 is: 44.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.35 : 131.05 = 29.57 : x
  2. Step 2: Convert to fraction form
    87.35/131.05 = 29.57/x
  3. Step 3: Cross multiply
    87.35x = 131.05 × 29.57
  4. Step 4: Simplify right side
    87.35x = 3,875.31
  5. Step 5: Solve for x
    x = 3,875.31/87.35
  6. Step 6: Final answer
    x = 44.36

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.