Home / 129,920.18-194,805.81-39,939.48

Finding the Fourth Proportional to 129,920.18, 194,805.81 and 39,939.48

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Solution

The fourth proportional to 129,920.18, 194,805.81 and 39,939.48 is: 59,886.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,920.18 : 194,805.81 = 39,939.48 : x
  2. Step 2: Convert to fraction form
    129,920.18/194,805.81 = 39,939.48/x
  3. Step 3: Cross multiply
    129,920.18x = 194,805.81 × 39,939.48
  4. Step 4: Simplify right side
    129,920.18x = 7,780,442,752.38
  5. Step 5: Solve for x
    x = 7,780,442,752.38/129,920.18
  6. Step 6: Final answer
    x = 59,886.33

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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.