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Finding the Fourth Proportional to 206,040.60, 309,060.90 and 87,715.80

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Solution

The fourth proportional to 206,040.60, 309,060.90 and 87,715.80 is: 131,573.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,040.60 : 309,060.90 = 87,715.80 : x
  2. Step 2: Convert to fraction form
    206,040.60/309,060.90 = 87,715.80/x
  3. Step 3: Cross multiply
    206,040.60x = 309,060.90 × 87,715.80
  4. Step 4: Simplify right side
    206,040.60x = 27,109,524,092.22
  5. Step 5: Solve for x
    x = 27,109,524,092.22/206,040.60
  6. Step 6: Final answer
    x = 131,573.70

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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.