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Finding the Fourth Proportional to 92.39, 126.67 and 90.77

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Solution

The fourth proportional to 92.39, 126.67 and 90.77 is: 124.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.39 : 126.67 = 90.77 : x
  2. Step 2: Convert to fraction form
    92.39/126.67 = 90.77/x
  3. Step 3: Cross multiply
    92.39x = 126.67 × 90.77
  4. Step 4: Simplify right side
    92.39x = 11,497.84
  5. Step 5: Solve for x
    x = 11,497.84/92.39
  6. Step 6: Final answer
    x = 124.45

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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.