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Finding the Fourth Proportional to 126.60, 174.40 and 93.76

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Solution

The fourth proportional to 126.60, 174.40 and 93.76 is: 129.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.60 : 174.40 = 93.76 : x
  2. Step 2: Convert to fraction form
    126.60/174.40 = 93.76/x
  3. Step 3: Cross multiply
    126.60x = 174.40 × 93.76
  4. Step 4: Simplify right side
    126.60x = 16,351.74
  5. Step 5: Solve for x
    x = 16,351.74/126.60
  6. Step 6: Final answer
    x = 129.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.