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Finding the Fourth Proportional to 83,809.21, 125,630.78 and 39,356.39

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Solution

The fourth proportional to 83,809.21, 125,630.78 and 39,356.39 is: 58,995.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,809.21 : 125,630.78 = 39,356.39 : x
  2. Step 2: Convert to fraction form
    83,809.21/125,630.78 = 39,356.39/x
  3. Step 3: Cross multiply
    83,809.21x = 125,630.78 × 39,356.39
  4. Step 4: Simplify right side
    83,809.21x = 4,944,373,776.90
  5. Step 5: Solve for x
    x = 4,944,373,776.90/83,809.21
  6. Step 6: Final answer
    x = 58,995.59

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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.