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Finding the Fourth Proportional to 206,919.20, 310,305.90 and 73,803.80

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Solution

The fourth proportional to 206,919.20, 310,305.90 and 73,803.80 is: 110,679.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,919.20 : 310,305.90 = 73,803.80 : x
  2. Step 2: Convert to fraction form
    206,919.20/310,305.90 = 73,803.80/x
  3. Step 3: Cross multiply
    206,919.20x = 310,305.90 × 73,803.80
  4. Step 4: Simplify right side
    206,919.20x = 22,901,754,582.42
  5. Step 5: Solve for x
    x = 22,901,754,582.42/206,919.20
  6. Step 6: Final answer
    x = 110,679.70

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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.