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Finding the Fourth Proportional to 122.71, 184.05 and 54.17

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Solution

The fourth proportional to 122.71, 184.05 and 54.17 is: 81.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.71 : 184.05 = 54.17 : x
  2. Step 2: Convert to fraction form
    122.71/184.05 = 54.17/x
  3. Step 3: Cross multiply
    122.71x = 184.05 × 54.17
  4. Step 4: Simplify right side
    122.71x = 9,969.99
  5. Step 5: Solve for x
    x = 9,969.99/122.71
  6. Step 6: Final answer
    x = 81.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.