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Finding the Fourth Proportional to 129.24, 192.57 and 127.08

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Solution

The fourth proportional to 129.24, 192.57 and 127.08 is: 189.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.24 : 192.57 = 127.08 : x
  2. Step 2: Convert to fraction form
    129.24/192.57 = 127.08/x
  3. Step 3: Cross multiply
    129.24x = 192.57 × 127.08
  4. Step 4: Simplify right side
    129.24x = 24,471.80
  5. Step 5: Solve for x
    x = 24,471.80/129.24
  6. Step 6: Final answer
    x = 189.35

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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.