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Finding the Fourth Proportional to 65.95, 98.91 and 55.18

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Solution

The fourth proportional to 65.95, 98.91 and 55.18 is: 82.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.95 : 98.91 = 55.18 : x
  2. Step 2: Convert to fraction form
    65.95/98.91 = 55.18/x
  3. Step 3: Cross multiply
    65.95x = 98.91 × 55.18
  4. Step 4: Simplify right side
    65.95x = 5,457.85
  5. Step 5: Solve for x
    x = 5,457.85/65.95
  6. Step 6: Final answer
    x = 82.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.