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Finding the Fourth Proportional to 118.47, 178.60 and 116.93

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Solution

The fourth proportional to 118.47, 178.60 and 116.93 is: 176.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.47 : 178.60 = 116.93 : x
  2. Step 2: Convert to fraction form
    118.47/178.60 = 116.93/x
  3. Step 3: Cross multiply
    118.47x = 178.60 × 116.93
  4. Step 4: Simplify right side
    118.47x = 20,883.70
  5. Step 5: Solve for x
    x = 20,883.70/118.47
  6. Step 6: Final answer
    x = 176.28

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.