Home / 87,191.20-120,360.48-73,831.72

Finding the Fourth Proportional to 87,191.20, 120,360.48 and 73,831.72

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Solution

The fourth proportional to 87,191.20, 120,360.48 and 73,831.72 is: 101,918.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,191.20 : 120,360.48 = 73,831.72 : x
  2. Step 2: Convert to fraction form
    87,191.20/120,360.48 = 73,831.72/x
  3. Step 3: Cross multiply
    87,191.20x = 120,360.48 × 73,831.72
  4. Step 4: Simplify right side
    87,191.20x = 8,886,421,258.43
  5. Step 5: Solve for x
    x = 8,886,421,258.43/87,191.20
  6. Step 6: Final answer
    x = 101,918.79

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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.