Home / 83,894.20-125,987.10-81,269.80

Finding the Fourth Proportional to 83,894.20, 125,987.10 and 81,269.80

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Solution

The fourth proportional to 83,894.20, 125,987.10 and 81,269.80 is: 122,045.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,894.20 : 125,987.10 = 81,269.80 : x
  2. Step 2: Convert to fraction form
    83,894.20/125,987.10 = 81,269.80/x
  3. Step 3: Cross multiply
    83,894.20x = 125,987.10 × 81,269.80
  4. Step 4: Simplify right side
    83,894.20x = 10,238,946,419.58
  5. Step 5: Solve for x
    x = 10,238,946,419.58/83,894.20
  6. Step 6: Final answer
    x = 122,045.94

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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.