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Finding the Fourth Proportional to 72.66, 108.49 and 63.55

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Solution

The fourth proportional to 72.66, 108.49 and 63.55 is: 94.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.66 : 108.49 = 63.55 : x
  2. Step 2: Convert to fraction form
    72.66/108.49 = 63.55/x
  3. Step 3: Cross multiply
    72.66x = 108.49 × 63.55
  4. Step 4: Simplify right side
    72.66x = 6,894.11
  5. Step 5: Solve for x
    x = 6,894.11/72.66
  6. Step 6: Final answer
    x = 94.88

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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.