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Finding the Fourth Proportional to 65.48, 98.79 and 63.11

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Solution

The fourth proportional to 65.48, 98.79 and 63.11 is: 95.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.48 : 98.79 = 63.11 : x
  2. Step 2: Convert to fraction form
    65.48/98.79 = 63.11/x
  3. Step 3: Cross multiply
    65.48x = 98.79 × 63.11
  4. Step 4: Simplify right side
    65.48x = 6,234.14
  5. Step 5: Solve for x
    x = 6,234.14/65.48
  6. Step 6: Final answer
    x = 95.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.