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Finding the Fourth Proportional to 63.47, 94.78 and 54.35

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Solution

The fourth proportional to 63.47, 94.78 and 54.35 is: 81.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.47 : 94.78 = 54.35 : x
  2. Step 2: Convert to fraction form
    63.47/94.78 = 54.35/x
  3. Step 3: Cross multiply
    63.47x = 94.78 × 54.35
  4. Step 4: Simplify right side
    63.47x = 5,151.29
  5. Step 5: Solve for x
    x = 5,151.29/63.47
  6. Step 6: Final answer
    x = 81.16

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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.