Home / 206,965.40-310,448.10-66,738.20

Finding the Fourth Proportional to 206,965.40, 310,448.10 and 66,738.20

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Solution

The fourth proportional to 206,965.40, 310,448.10 and 66,738.20 is: 100,107.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,965.40 : 310,448.10 = 66,738.20 : x
  2. Step 2: Convert to fraction form
    206,965.40/310,448.10 = 66,738.20/x
  3. Step 3: Cross multiply
    206,965.40x = 310,448.10 × 66,738.20
  4. Step 4: Simplify right side
    206,965.40x = 20,718,747,387.42
  5. Step 5: Solve for x
    x = 20,718,747,387.42/206,965.40
  6. Step 6: Final answer
    x = 100,107.30

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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.