Home / 115,134.20-172,409.70-91,806.20

Finding the Fourth Proportional to 115,134.20, 172,409.70 and 91,806.20

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Solution

The fourth proportional to 115,134.20, 172,409.70 and 91,806.20 is: 137,476.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,134.20 : 172,409.70 = 91,806.20 : x
  2. Step 2: Convert to fraction form
    115,134.20/172,409.70 = 91,806.20/x
  3. Step 3: Cross multiply
    115,134.20x = 172,409.70 × 91,806.20
  4. Step 4: Simplify right side
    115,134.20x = 15,828,279,400.14
  5. Step 5: Solve for x
    x = 15,828,279,400.14/115,134.20
  6. Step 6: Final answer
    x = 137,476.78

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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.