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Finding the Fourth Proportional to 129.64, 178.68 and 124.60

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Solution

The fourth proportional to 129.64, 178.68 and 124.60 is: 171.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.64 : 178.68 = 124.60 : x
  2. Step 2: Convert to fraction form
    129.64/178.68 = 124.60/x
  3. Step 3: Cross multiply
    129.64x = 178.68 × 124.60
  4. Step 4: Simplify right side
    129.64x = 22,263.53
  5. Step 5: Solve for x
    x = 22,263.53/129.64
  6. Step 6: Final answer
    x = 171.73

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