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Finding the Fourth Proportional to 87.35, 130.95 and 36

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Solution

The fourth proportional to 87.35, 130.95 and 36 is: 53.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.35 : 130.95 = 36 : x
  2. Step 2: Convert to fraction form
    87.35/130.95 = 36/x
  3. Step 3: Cross multiply
    87.35x = 130.95 × 36
  4. Step 4: Simplify right side
    87.35x = 4,714.20
  5. Step 5: Solve for x
    x = 4,714.20/87.35
  6. Step 6: Final answer
    x = 53.97

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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.