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Finding the Fourth Proportional to 117.28, 175.01 and 112.87

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Solution

The fourth proportional to 117.28, 175.01 and 112.87 is: 168.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.28 : 175.01 = 112.87 : x
  2. Step 2: Convert to fraction form
    117.28/175.01 = 112.87/x
  3. Step 3: Cross multiply
    117.28x = 175.01 × 112.87
  4. Step 4: Simplify right side
    117.28x = 19,753.38
  5. Step 5: Solve for x
    x = 19,753.38/117.28
  6. Step 6: Final answer
    x = 168.43

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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.