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Finding the Fourth Proportional to 83,994.80, 125,819.40 and 57,729.20

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Solution

The fourth proportional to 83,994.80, 125,819.40 and 57,729.20 is: 86,475.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,994.80 : 125,819.40 = 57,729.20 : x
  2. Step 2: Convert to fraction form
    83,994.80/125,819.40 = 57,729.20/x
  3. Step 3: Cross multiply
    83,994.80x = 125,819.40 × 57,729.20
  4. Step 4: Simplify right side
    83,994.80x = 7,263,453,306.48
  5. Step 5: Solve for x
    x = 7,263,453,306.48/83,994.80
  6. Step 6: Final answer
    x = 86,475.04

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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.