Home / 219,642.15-329,338.39-86,450.21

Finding the Fourth Proportional to 219,642.15, 329,338.39 and 86,450.21

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Solution

The fourth proportional to 219,642.15, 329,338.39 and 86,450.21 is: 129,626.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,642.15 : 329,338.39 = 86,450.21 : x
  2. Step 2: Convert to fraction form
    219,642.15/329,338.39 = 86,450.21/x
  3. Step 3: Cross multiply
    219,642.15x = 329,338.39 × 86,450.21
  4. Step 4: Simplify right side
    219,642.15x = 28,471,372,976.56
  5. Step 5: Solve for x
    x = 28,471,372,976.56/219,642.15
  6. Step 6: Final answer
    x = 129,626.18

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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.