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Finding the Fourth Proportional to 185,414.20, 256,081.86 and 124,879.72

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Solution

The fourth proportional to 185,414.20, 256,081.86 and 124,879.72 is: 172,475.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,414.20 : 256,081.86 = 124,879.72 : x
  2. Step 2: Convert to fraction form
    185,414.20/256,081.86 = 124,879.72/x
  3. Step 3: Cross multiply
    185,414.20x = 256,081.86 × 124,879.72
  4. Step 4: Simplify right side
    185,414.20x = 31,979,430,973.88
  5. Step 5: Solve for x
    x = 31,979,430,973.88/185,414.20
  6. Step 6: Final answer
    x = 172,475.63

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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.