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Finding the Fourth Proportional to 66.25, 98.86 and 60.19

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Solution

The fourth proportional to 66.25, 98.86 and 60.19 is: 89.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.25 : 98.86 = 60.19 : x
  2. Step 2: Convert to fraction form
    66.25/98.86 = 60.19/x
  3. Step 3: Cross multiply
    66.25x = 98.86 × 60.19
  4. Step 4: Simplify right side
    66.25x = 5,950.38
  5. Step 5: Solve for x
    x = 5,950.38/66.25
  6. Step 6: Final answer
    x = 89.82

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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.