Home / 126,126.72-189,062.51-81,781.65

Finding the Fourth Proportional to 126,126.72, 189,062.51 and 81,781.65

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Solution

The fourth proportional to 126,126.72, 189,062.51 and 81,781.65 is: 122,589.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,126.72 : 189,062.51 = 81,781.65 : x
  2. Step 2: Convert to fraction form
    126,126.72/189,062.51 = 81,781.65/x
  3. Step 3: Cross multiply
    126,126.72x = 189,062.51 × 81,781.65
  4. Step 4: Simplify right side
    126,126.72x = 15,461,843,612.03
  5. Step 5: Solve for x
    x = 15,461,843,612.03/126,126.72
  6. Step 6: Final answer
    x = 122,589.75

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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.