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Finding the Fourth Proportional to 146.98, 202.85 and 91.71

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Solution

The fourth proportional to 146.98, 202.85 and 91.71 is: 126.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.98 : 202.85 = 91.71 : x
  2. Step 2: Convert to fraction form
    146.98/202.85 = 91.71/x
  3. Step 3: Cross multiply
    146.98x = 202.85 × 91.71
  4. Step 4: Simplify right side
    146.98x = 18,603.26
  5. Step 5: Solve for x
    x = 18,603.26/146.98
  6. Step 6: Final answer
    x = 126.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.