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Finding the Fourth Proportional to 123.54, 185.36 and 55.16

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Solution

The fourth proportional to 123.54, 185.36 and 55.16 is: 82.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.54 : 185.36 = 55.16 : x
  2. Step 2: Convert to fraction form
    123.54/185.36 = 55.16/x
  3. Step 3: Cross multiply
    123.54x = 185.36 × 55.16
  4. Step 4: Simplify right side
    123.54x = 10,224.46
  5. Step 5: Solve for x
    x = 10,224.46/123.54
  6. Step 6: Final answer
    x = 82.76

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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.