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Finding the Fourth Proportional to 124,879.52, 172,218.71 and 81,843.35

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Solution

The fourth proportional to 124,879.52, 172,218.71 and 81,843.35 is: 112,868.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,879.52 : 172,218.71 = 81,843.35 : x
  2. Step 2: Convert to fraction form
    124,879.52/172,218.71 = 81,843.35/x
  3. Step 3: Cross multiply
    124,879.52x = 172,218.71 × 81,843.35
  4. Step 4: Simplify right side
    124,879.52x = 14,094,955,502.59
  5. Step 5: Solve for x
    x = 14,094,955,502.59/124,879.52
  6. Step 6: Final answer
    x = 112,868.43

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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.