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Finding the Fourth Proportional to 104.72, 156.24 and 93.71

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Solution

The fourth proportional to 104.72, 156.24 and 93.71 is: 139.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.72 : 156.24 = 93.71 : x
  2. Step 2: Convert to fraction form
    104.72/156.24 = 93.71/x
  3. Step 3: Cross multiply
    104.72x = 156.24 × 93.71
  4. Step 4: Simplify right side
    104.72x = 14,640.89
  5. Step 5: Solve for x
    x = 14,640.89/104.72
  6. Step 6: Final answer
    x = 139.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.