Home / 67,939.56-93,767.76-39,639.78

Finding the Fourth Proportional to 67,939.56, 93,767.76 and 39,639.78

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Solution

The fourth proportional to 67,939.56, 93,767.76 and 39,639.78 is: 54,709.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,939.56 : 93,767.76 = 39,639.78 : x
  2. Step 2: Convert to fraction form
    67,939.56/93,767.76 = 39,639.78/x
  3. Step 3: Cross multiply
    67,939.56x = 93,767.76 × 39,639.78
  4. Step 4: Simplify right side
    67,939.56x = 3,716,933,377.49
  5. Step 5: Solve for x
    x = 3,716,933,377.49/67,939.56
  6. Step 6: Final answer
    x = 54,709.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.