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Finding the Fourth Proportional to 118.57, 177.58 and 60.61

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Solution

The fourth proportional to 118.57, 177.58 and 60.61 is: 90.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.57 : 177.58 = 60.61 : x
  2. Step 2: Convert to fraction form
    118.57/177.58 = 60.61/x
  3. Step 3: Cross multiply
    118.57x = 177.58 × 60.61
  4. Step 4: Simplify right side
    118.57x = 10,763.12
  5. Step 5: Solve for x
    x = 10,763.12/118.57
  6. Step 6: Final answer
    x = 90.77

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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.