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Finding the Fourth Proportional to 80,887.20, 121,330.80 and 68,056.80

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Solution

The fourth proportional to 80,887.20, 121,330.80 and 68,056.80 is: 102,085.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,887.20 : 121,330.80 = 68,056.80 : x
  2. Step 2: Convert to fraction form
    80,887.20/121,330.80 = 68,056.80/x
  3. Step 3: Cross multiply
    80,887.20x = 121,330.80 × 68,056.80
  4. Step 4: Simplify right side
    80,887.20x = 8,257,385,989.44
  5. Step 5: Solve for x
    x = 8,257,385,989.44/80,887.20
  6. Step 6: Final answer
    x = 102,085.20

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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.