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Finding the Fourth Proportional to 207,489.90, 311,388.45 and 82,920.30

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Solution

The fourth proportional to 207,489.90, 311,388.45 and 82,920.30 is: 124,441.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,489.90 : 311,388.45 = 82,920.30 : x
  2. Step 2: Convert to fraction form
    207,489.90/311,388.45 = 82,920.30/x
  3. Step 3: Cross multiply
    207,489.90x = 311,388.45 × 82,920.30
  4. Step 4: Simplify right side
    207,489.90x = 25,820,423,690.54
  5. Step 5: Solve for x
    x = 25,820,423,690.54/207,489.90
  6. Step 6: Final answer
    x = 124,441.83

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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.