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Finding the Fourth Proportional to 63.61, 94.96 and 61.36

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Solution

The fourth proportional to 63.61, 94.96 and 61.36 is: 91.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.61 : 94.96 = 61.36 : x
  2. Step 2: Convert to fraction form
    63.61/94.96 = 61.36/x
  3. Step 3: Cross multiply
    63.61x = 94.96 × 61.36
  4. Step 4: Simplify right side
    63.61x = 5,826.90
  5. Step 5: Solve for x
    x = 5,826.90/63.61
  6. Step 6: Final answer
    x = 91.60

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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.