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Finding the Fourth Proportional to 71,151.90, 106,640.37 and 39,921.54

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Solution

The fourth proportional to 71,151.90, 106,640.37 and 39,921.54 is: 59,833.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,151.90 : 106,640.37 = 39,921.54 : x
  2. Step 2: Convert to fraction form
    71,151.90/106,640.37 = 39,921.54/x
  3. Step 3: Cross multiply
    71,151.90x = 106,640.37 × 39,921.54
  4. Step 4: Simplify right side
    71,151.90x = 4,257,247,796.57
  5. Step 5: Solve for x
    x = 4,257,247,796.57/71,151.90
  6. Step 6: Final answer
    x = 59,833.23

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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.