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Finding the Fourth Proportional to 295,129.39, 442,644.57 and 81,918.97

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Solution

The fourth proportional to 295,129.39, 442,644.57 and 81,918.97 is: 122,864.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    295,129.39 : 442,644.57 = 81,918.97 : x
  2. Step 2: Convert to fraction form
    295,129.39/442,644.57 = 81,918.97/x
  3. Step 3: Cross multiply
    295,129.39x = 442,644.57 × 81,918.97
  4. Step 4: Simplify right side
    295,129.39x = 36,260,987,250.49
  5. Step 5: Solve for x
    x = 36,260,987,250.49/295,129.39
  6. Step 6: Final answer
    x = 122,864.71

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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.