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Finding the Fourth Proportional to 83,716.80, 125,575.20 and 28,312.80

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Solution

The fourth proportional to 83,716.80, 125,575.20 and 28,312.80 is: 42,469.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,716.80 : 125,575.20 = 28,312.80 : x
  2. Step 2: Convert to fraction form
    83,716.80/125,575.20 = 28,312.80/x
  3. Step 3: Cross multiply
    83,716.80x = 125,575.20 × 28,312.80
  4. Step 4: Simplify right side
    83,716.80x = 3,555,385,522.56
  5. Step 5: Solve for x
    x = 3,555,385,522.56/83,716.80
  6. Step 6: Final answer
    x = 42,469.20

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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.