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Finding the Fourth Proportional to 66.26, 98.89 and 57.65

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Solution

The fourth proportional to 66.26, 98.89 and 57.65 is: 86.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.26 : 98.89 = 57.65 : x
  2. Step 2: Convert to fraction form
    66.26/98.89 = 57.65/x
  3. Step 3: Cross multiply
    66.26x = 98.89 × 57.65
  4. Step 4: Simplify right side
    66.26x = 5,701.01
  5. Step 5: Solve for x
    x = 5,701.01/66.26
  6. Step 6: Final answer
    x = 86.04

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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.