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Finding the Fourth Proportional to 83,657.80, 125,486.70 and 28,253.80

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Solution

The fourth proportional to 83,657.80, 125,486.70 and 28,253.80 is: 42,380.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,657.80 : 125,486.70 = 28,253.80 : x
  2. Step 2: Convert to fraction form
    83,657.80/125,486.70 = 28,253.80/x
  3. Step 3: Cross multiply
    83,657.80x = 125,486.70 × 28,253.80
  4. Step 4: Simplify right side
    83,657.80x = 3,545,476,124.46
  5. Step 5: Solve for x
    x = 3,545,476,124.46/83,657.80
  6. Step 6: Final answer
    x = 42,380.70

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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.