Home / 80,989.31-121,483.08-27,680.78

Finding the Fourth Proportional to 80,989.31, 121,483.08 and 27,680.78

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Solution

The fourth proportional to 80,989.31, 121,483.08 and 27,680.78 is: 41,520.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,989.31 : 121,483.08 = 27,680.78 : x
  2. Step 2: Convert to fraction form
    80,989.31/121,483.08 = 27,680.78/x
  3. Step 3: Cross multiply
    80,989.31x = 121,483.08 × 27,680.78
  4. Step 4: Simplify right side
    80,989.31x = 3,362,745,803.79
  5. Step 5: Solve for x
    x = 3,362,745,803.79/80,989.31
  6. Step 6: Final answer
    x = 41,520.86

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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.