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Finding the Fourth Proportional to 118.64, 177.66 and 75.17

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Solution

The fourth proportional to 118.64, 177.66 and 75.17 is: 112.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.64 : 177.66 = 75.17 : x
  2. Step 2: Convert to fraction form
    118.64/177.66 = 75.17/x
  3. Step 3: Cross multiply
    118.64x = 177.66 × 75.17
  4. Step 4: Simplify right side
    118.64x = 13,354.33
  5. Step 5: Solve for x
    x = 13,354.33/118.64
  6. Step 6: Final answer
    x = 112.57

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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.