Home / 129,929.22-194,912.30-39,979.40

Finding the Fourth Proportional to 129,929.22, 194,912.30 and 39,979.40

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Solution

The fourth proportional to 129,929.22, 194,912.30 and 39,979.40 is: 59,974.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,929.22 : 194,912.30 = 39,979.40 : x
  2. Step 2: Convert to fraction form
    129,929.22/194,912.30 = 39,979.40/x
  3. Step 3: Cross multiply
    129,929.22x = 194,912.30 × 39,979.40
  4. Step 4: Simplify right side
    129,929.22x = 7,792,475,932.01
  5. Step 5: Solve for x
    x = 7,792,475,932.01/129,929.22
  6. Step 6: Final answer
    x = 59,974.78

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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.