Home / 219,912.12-329,646.24-86,718.96

Finding the Fourth Proportional to 219,912.12, 329,646.24 and 86,718.96

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Solution

The fourth proportional to 219,912.12, 329,646.24 and 86,718.96 is: 129,990.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,912.12 : 329,646.24 = 86,718.96 : x
  2. Step 2: Convert to fraction form
    219,912.12/329,646.24 = 86,718.96/x
  3. Step 3: Cross multiply
    219,912.12x = 329,646.24 × 86,718.96
  4. Step 4: Simplify right side
    219,912.12x = 28,586,579,100.71
  5. Step 5: Solve for x
    x = 28,586,579,100.71/219,912.12
  6. Step 6: Final answer
    x = 129,990.92

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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.