Home / 87,078.56-120,193.25-51,289.20

Finding the Fourth Proportional to 87,078.56, 120,193.25 and 51,289.20

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Solution

The fourth proportional to 87,078.56, 120,193.25 and 51,289.20 is: 70,793.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,078.56 : 120,193.25 = 51,289.20 : x
  2. Step 2: Convert to fraction form
    87,078.56/120,193.25 = 51,289.20/x
  3. Step 3: Cross multiply
    87,078.56x = 120,193.25 × 51,289.20
  4. Step 4: Simplify right side
    87,078.56x = 6,164,615,381.45
  5. Step 5: Solve for x
    x = 6,164,615,381.45/87,078.56
  6. Step 6: Final answer
    x = 70,793.73

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1.5x scale

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.