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Finding the Fourth Proportional to 93.97, 140.14 and 90.55

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Solution

The fourth proportional to 93.97, 140.14 and 90.55 is: 135.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.97 : 140.14 = 90.55 : x
  2. Step 2: Convert to fraction form
    93.97/140.14 = 90.55/x
  3. Step 3: Cross multiply
    93.97x = 140.14 × 90.55
  4. Step 4: Simplify right side
    93.97x = 12,689.85
  5. Step 5: Solve for x
    x = 12,689.85/93.97
  6. Step 6: Final answer
    x = 135.04

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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.