Home / 74,640.20-111,960.30-45,115.70

Finding the Fourth Proportional to 74,640.20, 111,960.30 and 45,115.70

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Solution

The fourth proportional to 74,640.20, 111,960.30 and 45,115.70 is: 67,673.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,640.20 : 111,960.30 = 45,115.70 : x
  2. Step 2: Convert to fraction form
    74,640.20/111,960.30 = 45,115.70/x
  3. Step 3: Cross multiply
    74,640.20x = 111,960.30 × 45,115.70
  4. Step 4: Simplify right side
    74,640.20x = 5,051,167,306.71
  5. Step 5: Solve for x
    x = 5,051,167,306.71/74,640.20
  6. Step 6: Final answer
    x = 67,673.55

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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.