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Finding the Fourth Proportional to 123.16, 184.86 and 80.44

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Solution

The fourth proportional to 123.16, 184.86 and 80.44 is: 120.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.16 : 184.86 = 80.44 : x
  2. Step 2: Convert to fraction form
    123.16/184.86 = 80.44/x
  3. Step 3: Cross multiply
    123.16x = 184.86 × 80.44
  4. Step 4: Simplify right side
    123.16x = 14,870.14
  5. Step 5: Solve for x
    x = 14,870.14/123.16
  6. Step 6: Final answer
    x = 120.74

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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.