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Finding the Fourth Proportional to 129.48, 192.84 and 127.92

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Solution

The fourth proportional to 129.48, 192.84 and 127.92 is: 190.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.48 : 192.84 = 127.92 : x
  2. Step 2: Convert to fraction form
    129.48/192.84 = 127.92/x
  3. Step 3: Cross multiply
    129.48x = 192.84 × 127.92
  4. Step 4: Simplify right side
    129.48x = 24,668.09
  5. Step 5: Solve for x
    x = 24,668.09/129.48
  6. Step 6: Final answer
    x = 190.52

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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.