Home / 427,223.85-640,872.23-111,680.25

Finding the Fourth Proportional to 427,223.85, 640,872.23 and 111,680.25

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Solution

The fourth proportional to 427,223.85, 640,872.23 and 111,680.25 is: 167,529.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,223.85 : 640,872.23 = 111,680.25 : x
  2. Step 2: Convert to fraction form
    427,223.85/640,872.23 = 111,680.25/x
  3. Step 3: Cross multiply
    427,223.85x = 640,872.23 × 111,680.25
  4. Step 4: Simplify right side
    427,223.85x = 71,572,770,306.06
  5. Step 5: Solve for x
    x = 71,572,770,306.06/427,223.85
  6. Step 6: Final answer
    x = 167,529.90

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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.