Home / 80,688.43-121,012.05-57,216.43

Finding the Fourth Proportional to 80,688.43, 121,012.05 and 57,216.43

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Solution

The fourth proportional to 80,688.43, 121,012.05 and 57,216.43 is: 85,810.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,688.43 : 121,012.05 = 57,216.43 : x
  2. Step 2: Convert to fraction form
    80,688.43/121,012.05 = 57,216.43/x
  3. Step 3: Cross multiply
    80,688.43x = 121,012.05 × 57,216.43
  4. Step 4: Simplify right side
    80,688.43x = 6,923,876,882.92
  5. Step 5: Solve for x
    x = 6,923,876,882.92/80,688.43
  6. Step 6: Final answer
    x = 85,810.04

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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.