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Finding the Fourth Proportional to 122.94, 184.14 and 98.91

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Solution

The fourth proportional to 122.94, 184.14 and 98.91 is: 148.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.94 : 184.14 = 98.91 : x
  2. Step 2: Convert to fraction form
    122.94/184.14 = 98.91/x
  3. Step 3: Cross multiply
    122.94x = 184.14 × 98.91
  4. Step 4: Simplify right side
    122.94x = 18,213.29
  5. Step 5: Solve for x
    x = 18,213.29/122.94
  6. Step 6: Final answer
    x = 148.15

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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.