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Finding the Fourth Proportional to 84.62, 127.20 and 52.76

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Solution

The fourth proportional to 84.62, 127.20 and 52.76 is: 79.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.62 : 127.20 = 52.76 : x
  2. Step 2: Convert to fraction form
    84.62/127.20 = 52.76/x
  3. Step 3: Cross multiply
    84.62x = 127.20 × 52.76
  4. Step 4: Simplify right side
    84.62x = 6,711.07
  5. Step 5: Solve for x
    x = 6,711.07/84.62
  6. Step 6: Final answer
    x = 79.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.