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Finding the Fourth Proportional to 66.32, 98.90 and 63.62

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Solution

The fourth proportional to 66.32, 98.90 and 63.62 is: 94.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.32 : 98.90 = 63.62 : x
  2. Step 2: Convert to fraction form
    66.32/98.90 = 63.62/x
  3. Step 3: Cross multiply
    66.32x = 98.90 × 63.62
  4. Step 4: Simplify right side
    66.32x = 6,292.02
  5. Step 5: Solve for x
    x = 6,292.02/66.32
  6. Step 6: Final answer
    x = 94.87

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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.