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Finding the Fourth Proportional to 91.98, 126.74 and 73.62

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Solution

The fourth proportional to 91.98, 126.74 and 73.62 is: 101.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.98 : 126.74 = 73.62 : x
  2. Step 2: Convert to fraction form
    91.98/126.74 = 73.62/x
  3. Step 3: Cross multiply
    91.98x = 126.74 × 73.62
  4. Step 4: Simplify right side
    91.98x = 9,330.60
  5. Step 5: Solve for x
    x = 9,330.60/91.98
  6. Step 6: Final answer
    x = 101.44

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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.