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Finding the Fourth Proportional to 104.27, 156.36 and 87.26

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Solution

The fourth proportional to 104.27, 156.36 and 87.26 is: 130.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.27 : 156.36 = 87.26 : x
  2. Step 2: Convert to fraction form
    104.27/156.36 = 87.26/x
  3. Step 3: Cross multiply
    104.27x = 156.36 × 87.26
  4. Step 4: Simplify right side
    104.27x = 13,643.19
  5. Step 5: Solve for x
    x = 13,643.19/104.27
  6. Step 6: Final answer
    x = 130.85

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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.