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Finding the Fourth Proportional to 91.61, 126.25 and 67.06

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Solution

The fourth proportional to 91.61, 126.25 and 67.06 is: 92.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.61 : 126.25 = 67.06 : x
  2. Step 2: Convert to fraction form
    91.61/126.25 = 67.06/x
  3. Step 3: Cross multiply
    91.61x = 126.25 × 67.06
  4. Step 4: Simplify right side
    91.61x = 8,466.01
  5. Step 5: Solve for x
    x = 8,466.01/91.61
  6. Step 6: Final answer
    x = 92.41

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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.