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Finding the Fourth Proportional to 83,889.90, 115,769.25 and 45,650.61

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Solution

The fourth proportional to 83,889.90, 115,769.25 and 45,650.61 is: 62,998.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,889.90 : 115,769.25 = 45,650.61 : x
  2. Step 2: Convert to fraction form
    83,889.90/115,769.25 = 45,650.61/x
  3. Step 3: Cross multiply
    83,889.90x = 115,769.25 × 45,650.61
  4. Step 4: Simplify right side
    83,889.90x = 5,284,936,881.74
  5. Step 5: Solve for x
    x = 5,284,936,881.74/83,889.90
  6. Step 6: Final answer
    x = 62,998.49

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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.