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Finding the Fourth Proportional to 80,882.60, 121,323.90 and 51,212.30

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Solution

The fourth proportional to 80,882.60, 121,323.90 and 51,212.30 is: 76,818.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,882.60 : 121,323.90 = 51,212.30 : x
  2. Step 2: Convert to fraction form
    80,882.60/121,323.90 = 51,212.30/x
  3. Step 3: Cross multiply
    80,882.60x = 121,323.90 × 51,212.30
  4. Step 4: Simplify right side
    80,882.60x = 6,213,275,963.97
  5. Step 5: Solve for x
    x = 6,213,275,963.97/80,882.60
  6. Step 6: Final answer
    x = 76,818.45

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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.