Home / 84,119.20-126,178.29-20,939.00

Finding the Fourth Proportional to 84,119.20, 126,178.29 and 20,939.00

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Solution

The fourth proportional to 84,119.20, 126,178.29 and 20,939.00 is: 31,408.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,119.20 : 126,178.29 = 20,939.00 : x
  2. Step 2: Convert to fraction form
    84,119.20/126,178.29 = 20,939.00/x
  3. Step 3: Cross multiply
    84,119.20x = 126,178.29 × 20,939.00
  4. Step 4: Simplify right side
    84,119.20x = 2,642,046,583.42
  5. Step 5: Solve for x
    x = 2,642,046,583.42/84,119.20
  6. Step 6: Final answer
    x = 31,408.37

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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.