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Finding the Fourth Proportional to 86,251.80, 119,013.39 and 49,940.31

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Solution

The fourth proportional to 86,251.80, 119,013.39 and 49,940.31 is: 68,909.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,251.80 : 119,013.39 = 49,940.31 : x
  2. Step 2: Convert to fraction form
    86,251.80/119,013.39 = 49,940.31/x
  3. Step 3: Cross multiply
    86,251.80x = 119,013.39 × 49,940.31
  4. Step 4: Simplify right side
    86,251.80x = 5,943,565,590.75
  5. Step 5: Solve for x
    x = 5,943,565,590.75/86,251.80
  6. Step 6: Final answer
    x = 68,909.47

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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.