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Finding the Fourth Proportional to 93.87, 129.56 and 67.71

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Solution

The fourth proportional to 93.87, 129.56 and 67.71 is: 93.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.87 : 129.56 = 67.71 : x
  2. Step 2: Convert to fraction form
    93.87/129.56 = 67.71/x
  3. Step 3: Cross multiply
    93.87x = 129.56 × 67.71
  4. Step 4: Simplify right side
    93.87x = 8,772.17
  5. Step 5: Solve for x
    x = 8,772.17/93.87
  6. Step 6: Final answer
    x = 93.45

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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.