Home / 138,694.46-191,403.23-78,261.57

Finding the Fourth Proportional to 138,694.46, 191,403.23 and 78,261.57

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Solution

The fourth proportional to 138,694.46, 191,403.23 and 78,261.57 is: 108,003.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,694.46 : 191,403.23 = 78,261.57 : x
  2. Step 2: Convert to fraction form
    138,694.46/191,403.23 = 78,261.57/x
  3. Step 3: Cross multiply
    138,694.46x = 191,403.23 × 78,261.57
  4. Step 4: Simplify right side
    138,694.46x = 14,979,516,891.56
  5. Step 5: Solve for x
    x = 14,979,516,891.56/138,694.46
  6. Step 6: Final answer
    x = 108,003.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.