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Finding the Fourth Proportional to 80,863.80, 121,007.70 and 51,295.80

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Solution

The fourth proportional to 80,863.80, 121,007.70 and 51,295.80 is: 76,761.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,863.80 : 121,007.70 = 51,295.80 : x
  2. Step 2: Convert to fraction form
    80,863.80/121,007.70 = 51,295.80/x
  3. Step 3: Cross multiply
    80,863.80x = 121,007.70 × 51,295.80
  4. Step 4: Simplify right side
    80,863.80x = 6,207,186,777.66
  5. Step 5: Solve for x
    x = 6,207,186,777.66/80,863.80
  6. Step 6: Final answer
    x = 76,761.01

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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.