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Finding the Fourth Proportional to 91.77, 126.66 and 54.96

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Solution

The fourth proportional to 91.77, 126.66 and 54.96 is: 75.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.77 : 126.66 = 54.96 : x
  2. Step 2: Convert to fraction form
    91.77/126.66 = 54.96/x
  3. Step 3: Cross multiply
    91.77x = 126.66 × 54.96
  4. Step 4: Simplify right side
    91.77x = 6,961.23
  5. Step 5: Solve for x
    x = 6,961.23/91.77
  6. Step 6: Final answer
    x = 75.86

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