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Finding the Fourth Proportional to 97.26, 145.71 and 66.71

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Solution

The fourth proportional to 97.26, 145.71 and 66.71 is: 99.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.26 : 145.71 = 66.71 : x
  2. Step 2: Convert to fraction form
    97.26/145.71 = 66.71/x
  3. Step 3: Cross multiply
    97.26x = 145.71 × 66.71
  4. Step 4: Simplify right side
    97.26x = 9,720.31
  5. Step 5: Solve for x
    x = 9,720.31/97.26
  6. Step 6: Final answer
    x = 99.94

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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.