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Finding the Fourth Proportional to 83,898.40, 125,847.60 and 80,672.80

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Solution

The fourth proportional to 83,898.40, 125,847.60 and 80,672.80 is: 121,009.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,898.40 : 125,847.60 = 80,672.80 : x
  2. Step 2: Convert to fraction form
    83,898.40/125,847.60 = 80,672.80/x
  3. Step 3: Cross multiply
    83,898.40x = 125,847.60 × 80,672.80
  4. Step 4: Simplify right side
    83,898.40x = 10,152,478,265.28
  5. Step 5: Solve for x
    x = 10,152,478,265.28/83,898.40
  6. Step 6: Final answer
    x = 121,009.20

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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.