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Finding the Fourth Proportional to 92.08, 126.24 and 90.66

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Solution

The fourth proportional to 92.08, 126.24 and 90.66 is: 124.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.08 : 126.24 = 90.66 : x
  2. Step 2: Convert to fraction form
    92.08/126.24 = 90.66/x
  3. Step 3: Cross multiply
    92.08x = 126.24 × 90.66
  4. Step 4: Simplify right side
    92.08x = 11,444.92
  5. Step 5: Solve for x
    x = 11,444.92/92.08
  6. Step 6: Final answer
    x = 124.30

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.