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Finding the Fourth Proportional to 122.76, 183.96 and 58.56

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Solution

The fourth proportional to 122.76, 183.96 and 58.56 is: 87.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.76 : 183.96 = 58.56 : x
  2. Step 2: Convert to fraction form
    122.76/183.96 = 58.56/x
  3. Step 3: Cross multiply
    122.76x = 183.96 × 58.56
  4. Step 4: Simplify right side
    122.76x = 10,772.70
  5. Step 5: Solve for x
    x = 10,772.70/122.76
  6. Step 6: Final answer
    x = 87.75

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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.