Home / 87,912.90-121,319.64-47,627.66

Finding the Fourth Proportional to 87,912.90, 121,319.64 and 47,627.66

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Solution

The fourth proportional to 87,912.90, 121,319.64 and 47,627.66 is: 65,726.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,912.90 : 121,319.64 = 47,627.66 : x
  2. Step 2: Convert to fraction form
    87,912.90/121,319.64 = 47,627.66/x
  3. Step 3: Cross multiply
    87,912.90x = 121,319.64 × 47,627.66
  4. Step 4: Simplify right side
    87,912.90x = 5,778,170,868.54
  5. Step 5: Solve for x
    x = 5,778,170,868.54/87,912.90
  6. Step 6: Final answer
    x = 65,726.09

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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.