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Finding the Fourth Proportional to 87.00, 130.46 and 26.11

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Solution

The fourth proportional to 87.00, 130.46 and 26.11 is: 39.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.00 : 130.46 = 26.11 : x
  2. Step 2: Convert to fraction form
    87.00/130.46 = 26.11/x
  3. Step 3: Cross multiply
    87.00x = 130.46 × 26.11
  4. Step 4: Simplify right side
    87.00x = 3,406.31
  5. Step 5: Solve for x
    x = 3,406.31/87.00
  6. Step 6: Final answer
    x = 39.16

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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.