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Finding the Fourth Proportional to 51,659.92, 71,287.72 and 28,996.80

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Solution

The fourth proportional to 51,659.92, 71,287.72 and 28,996.80 is: 40,013.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,659.92 : 71,287.72 = 28,996.80 : x
  2. Step 2: Convert to fraction form
    51,659.92/71,287.72 = 28,996.80/x
  3. Step 3: Cross multiply
    51,659.92x = 71,287.72 × 28,996.80
  4. Step 4: Simplify right side
    51,659.92x = 2,067,115,759.30
  5. Step 5: Solve for x
    x = 2,067,115,759.30/51,659.92
  6. Step 6: Final answer
    x = 40,013.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.