Home / 138,452.46-191,065.26-81,125.65

Finding the Fourth Proportional to 138,452.46, 191,065.26 and 81,125.65

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Solution

The fourth proportional to 138,452.46, 191,065.26 and 81,125.65 is: 111,953.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,452.46 : 191,065.26 = 81,125.65 : x
  2. Step 2: Convert to fraction form
    138,452.46/191,065.26 = 81,125.65/x
  3. Step 3: Cross multiply
    138,452.46x = 191,065.26 × 81,125.65
  4. Step 4: Simplify right side
    138,452.46x = 15,500,293,409.92
  5. Step 5: Solve for x
    x = 15,500,293,409.92/138,452.46
  6. Step 6: Final answer
    x = 111,953.90

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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.