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Finding the Fourth Proportional to 93.71, 140.65 and 67.91

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Solution

The fourth proportional to 93.71, 140.65 and 67.91 is: 101.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.71 : 140.65 = 67.91 : x
  2. Step 2: Convert to fraction form
    93.71/140.65 = 67.91/x
  3. Step 3: Cross multiply
    93.71x = 140.65 × 67.91
  4. Step 4: Simplify right side
    93.71x = 9,551.20
  5. Step 5: Solve for x
    x = 9,551.20/93.71
  6. Step 6: Final answer
    x = 101.92

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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.