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Finding the Fourth Proportional to 84.79, 127.28 and 36.73

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Solution

The fourth proportional to 84.79, 127.28 and 36.73 is: 55.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.79 : 127.28 = 36.73 : x
  2. Step 2: Convert to fraction form
    84.79/127.28 = 36.73/x
  3. Step 3: Cross multiply
    84.79x = 127.28 × 36.73
  4. Step 4: Simplify right side
    84.79x = 4,674.81
  5. Step 5: Solve for x
    x = 4,674.81/84.79
  6. Step 6: Final answer
    x = 55.13

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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.