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Finding the Fourth Proportional to 83,649.90, 125,364.09 and 61,358.90

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Solution

The fourth proportional to 83,649.90, 125,364.09 and 61,358.90 is: 91,957.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,649.90 : 125,364.09 = 61,358.90 : x
  2. Step 2: Convert to fraction form
    83,649.90/125,364.09 = 61,358.90/x
  3. Step 3: Cross multiply
    83,649.90x = 125,364.09 × 61,358.90
  4. Step 4: Simplify right side
    83,649.90x = 7,692,202,661.90
  5. Step 5: Solve for x
    x = 7,692,202,661.90/83,649.90
  6. Step 6: Final answer
    x = 91,957.11

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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.