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Finding the Fourth Proportional to 199,599.80, 299,478.90 and 81,279.80

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Solution

The fourth proportional to 199,599.80, 299,478.90 and 81,279.80 is: 121,951.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,599.80 : 299,478.90 = 81,279.80 : x
  2. Step 2: Convert to fraction form
    199,599.80/299,478.90 = 81,279.80/x
  3. Step 3: Cross multiply
    199,599.80x = 299,478.90 × 81,279.80
  4. Step 4: Simplify right side
    199,599.80x = 24,341,585,096.22
  5. Step 5: Solve for x
    x = 24,341,585,096.22/199,599.80
  6. Step 6: Final answer
    x = 121,951.95

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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.