Home / 138,012.13-206,870.55-71,385.18

Finding the Fourth Proportional to 138,012.13, 206,870.55 and 71,385.18

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Solution

The fourth proportional to 138,012.13, 206,870.55 and 71,385.18 is: 107,001.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,012.13 : 206,870.55 = 71,385.18 : x
  2. Step 2: Convert to fraction form
    138,012.13/206,870.55 = 71,385.18/x
  3. Step 3: Cross multiply
    138,012.13x = 206,870.55 × 71,385.18
  4. Step 4: Simplify right side
    138,012.13x = 14,767,491,448.45
  5. Step 5: Solve for x
    x = 14,767,491,448.45/138,012.13
  6. Step 6: Final answer
    x = 107,001.40

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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.