Home / 80,362.32-120,543.13-20,391.36

Finding the Fourth Proportional to 80,362.32, 120,543.13 and 20,391.36

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Solution

The fourth proportional to 80,362.32, 120,543.13 and 20,391.36 is: 30,586.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,362.32 : 120,543.13 = 20,391.36 : x
  2. Step 2: Convert to fraction form
    80,362.32/120,543.13 = 20,391.36/x
  3. Step 3: Cross multiply
    80,362.32x = 120,543.13 × 20,391.36
  4. Step 4: Simplify right side
    80,362.32x = 2,458,038,359.36
  5. Step 5: Solve for x
    x = 2,458,038,359.36/80,362.32
  6. Step 6: Final answer
    x = 30,586.95

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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.