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Finding the Fourth Proportional to 129.32, 192.70 and 125.44

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Solution

The fourth proportional to 129.32, 192.70 and 125.44 is: 186.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.32 : 192.70 = 125.44 : x
  2. Step 2: Convert to fraction form
    129.32/192.70 = 125.44/x
  3. Step 3: Cross multiply
    129.32x = 192.70 × 125.44
  4. Step 4: Simplify right side
    129.32x = 24,172.29
  5. Step 5: Solve for x
    x = 24,172.29/129.32
  6. Step 6: Final answer
    x = 186.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.