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Finding the Fourth Proportional to 104.57, 156.51 and 85.14

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Solution

The fourth proportional to 104.57, 156.51 and 85.14 is: 127.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.57 : 156.51 = 85.14 : x
  2. Step 2: Convert to fraction form
    104.57/156.51 = 85.14/x
  3. Step 3: Cross multiply
    104.57x = 156.51 × 85.14
  4. Step 4: Simplify right side
    104.57x = 13,325.79
  5. Step 5: Solve for x
    x = 13,325.79/104.57
  6. Step 6: Final answer
    x = 127.44

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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.