Home / 149,939.10-206,921.49-81,960.61

Finding the Fourth Proportional to 149,939.10, 206,921.49 and 81,960.61

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Solution

The fourth proportional to 149,939.10, 206,921.49 and 81,960.61 is: 113,108.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,939.10 : 206,921.49 = 81,960.61 : x
  2. Step 2: Convert to fraction form
    149,939.10/206,921.49 = 81,960.61/x
  3. Step 3: Cross multiply
    149,939.10x = 206,921.49 × 81,960.61
  4. Step 4: Simplify right side
    149,939.10x = 16,959,411,105.83
  5. Step 5: Solve for x
    x = 16,959,411,105.83/149,939.10
  6. Step 6: Final answer
    x = 113,108.66

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1.5x scale

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.