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Finding the Fourth Proportional to 84.83, 127.92 and 84.29

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Solution

The fourth proportional to 84.83, 127.92 and 84.29 is: 127.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.83 : 127.92 = 84.29 : x
  2. Step 2: Convert to fraction form
    84.83/127.92 = 84.29/x
  3. Step 3: Cross multiply
    84.83x = 127.92 × 84.29
  4. Step 4: Simplify right side
    84.83x = 10,781.74
  5. Step 5: Solve for x
    x = 10,781.74/84.83
  6. Step 6: Final answer
    x = 127.11

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.