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Finding the Fourth Proportional to 129.80, 179.52 and 127.64

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Solution

The fourth proportional to 129.80, 179.52 and 127.64 is: 176.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.80 : 179.52 = 127.64 : x
  2. Step 2: Convert to fraction form
    129.80/179.52 = 127.64/x
  3. Step 3: Cross multiply
    129.80x = 179.52 × 127.64
  4. Step 4: Simplify right side
    129.80x = 22,913.93
  5. Step 5: Solve for x
    x = 22,913.93/129.80
  6. Step 6: Final answer
    x = 176.53

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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.