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Finding the Fourth Proportional to 206,422.40, 309,633.60 and 88,105.70

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Solution

The fourth proportional to 206,422.40, 309,633.60 and 88,105.70 is: 132,158.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,422.40 : 309,633.60 = 88,105.70 : x
  2. Step 2: Convert to fraction form
    206,422.40/309,633.60 = 88,105.70/x
  3. Step 3: Cross multiply
    206,422.40x = 309,633.60 × 88,105.70
  4. Step 4: Simplify right side
    206,422.40x = 27,280,485,071.52
  5. Step 5: Solve for x
    x = 27,280,485,071.52/206,422.40
  6. Step 6: Final answer
    x = 132,158.55

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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.