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Finding the Fourth Proportional to 184.86, 254.98 and 129.61

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Solution

The fourth proportional to 184.86, 254.98 and 129.61 is: 178.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    184.86 : 254.98 = 129.61 : x
  2. Step 2: Convert to fraction form
    184.86/254.98 = 129.61/x
  3. Step 3: Cross multiply
    184.86x = 254.98 × 129.61
  4. Step 4: Simplify right side
    184.86x = 33,047.31
  5. Step 5: Solve for x
    x = 33,047.31/184.86
  6. Step 6: Final answer
    x = 178.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.