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Finding the Fourth Proportional to 83,500.40, 125,542.20 and 81,750.80

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Solution

The fourth proportional to 83,500.40, 125,542.20 and 81,750.80 is: 122,911.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,500.40 : 125,542.20 = 81,750.80 : x
  2. Step 2: Convert to fraction form
    83,500.40/125,542.20 = 81,750.80/x
  3. Step 3: Cross multiply
    83,500.40x = 125,542.20 × 81,750.80
  4. Step 4: Simplify right side
    83,500.40x = 10,263,175,283.76
  5. Step 5: Solve for x
    x = 10,263,175,283.76/83,500.40
  6. Step 6: Final answer
    x = 122,911.69

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1.5x scale

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.