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Finding the Fourth Proportional to 83,825.20, 125,883.60 and 81,200.80

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Solution

The fourth proportional to 83,825.20, 125,883.60 and 81,200.80 is: 121,942.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,825.20 : 125,883.60 = 81,200.80 : x
  2. Step 2: Convert to fraction form
    83,825.20/125,883.60 = 81,200.80/x
  3. Step 3: Cross multiply
    83,825.20x = 125,883.60 × 81,200.80
  4. Step 4: Simplify right side
    83,825.20x = 10,221,849,026.88
  5. Step 5: Solve for x
    x = 10,221,849,026.88/83,825.20
  6. Step 6: Final answer
    x = 121,942.44

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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.