Home / 81,081.23-121,458.56-40,432.19

Finding the Fourth Proportional to 81,081.23, 121,458.56 and 40,432.19

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Solution

The fourth proportional to 81,081.23, 121,458.56 and 40,432.19 is: 60,566.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,081.23 : 121,458.56 = 40,432.19 : x
  2. Step 2: Convert to fraction form
    81,081.23/121,458.56 = 40,432.19/x
  3. Step 3: Cross multiply
    81,081.23x = 121,458.56 × 40,432.19
  4. Step 4: Simplify right side
    81,081.23x = 4,910,834,765.59
  5. Step 5: Solve for x
    x = 4,910,834,765.59/81,081.23
  6. Step 6: Final answer
    x = 60,566.85

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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.