Home / 127,959.40-191,939.10-71,972.20

Finding the Fourth Proportional to 127,959.40, 191,939.10 and 71,972.20

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Solution

The fourth proportional to 127,959.40, 191,939.10 and 71,972.20 is: 107,958.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,959.40 : 191,939.10 = 71,972.20 : x
  2. Step 2: Convert to fraction form
    127,959.40/191,939.10 = 71,972.20/x
  3. Step 3: Cross multiply
    127,959.40x = 191,939.10 × 71,972.20
  4. Step 4: Simplify right side
    127,959.40x = 13,814,279,293.02
  5. Step 5: Solve for x
    x = 13,814,279,293.02/127,959.40
  6. Step 6: Final answer
    x = 107,958.30

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1.5x scale

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.