Home / 84,144.40-126,216-20,964.08

Finding the Fourth Proportional to 84,144.40, 126,216 and 20,964.08

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Solution

The fourth proportional to 84,144.40, 126,216 and 20,964.08 is: 31,445.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,144.40 : 126,216 = 20,964.08 : x
  2. Step 2: Convert to fraction form
    84,144.40/126,216 = 20,964.08/x
  3. Step 3: Cross multiply
    84,144.40x = 126,216 × 20,964.08
  4. Step 4: Simplify right side
    84,144.40x = 2,646,002,321.28
  5. Step 5: Solve for x
    x = 2,646,002,321.28/84,144.40
  6. Step 6: Final answer
    x = 31,445.97

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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.