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Finding the Fourth Proportional to 123.24, 184.91 and 75.18

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Solution

The fourth proportional to 123.24, 184.91 and 75.18 is: 112.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.24 : 184.91 = 75.18 : x
  2. Step 2: Convert to fraction form
    123.24/184.91 = 75.18/x
  3. Step 3: Cross multiply
    123.24x = 184.91 × 75.18
  4. Step 4: Simplify right side
    123.24x = 13,901.53
  5. Step 5: Solve for x
    x = 13,901.53/123.24
  6. Step 6: Final answer
    x = 112.80

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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.