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Finding the Fourth Proportional to 93.73, 129.17 and 79.86

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Solution

The fourth proportional to 93.73, 129.17 and 79.86 is: 110.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.73 : 129.17 = 79.86 : x
  2. Step 2: Convert to fraction form
    93.73/129.17 = 79.86/x
  3. Step 3: Cross multiply
    93.73x = 129.17 × 79.86
  4. Step 4: Simplify right side
    93.73x = 10,315.52
  5. Step 5: Solve for x
    x = 10,315.52/93.73
  6. Step 6: Final answer
    x = 110.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.