Home / 81,231.12-121,831.80-36,847.20

Finding the Fourth Proportional to 81,231.12, 121,831.80 and 36,847.20

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Solution

The fourth proportional to 81,231.12, 121,831.80 and 36,847.20 is: 55,264.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,231.12 : 121,831.80 = 36,847.20 : x
  2. Step 2: Convert to fraction form
    81,231.12/121,831.80 = 36,847.20/x
  3. Step 3: Cross multiply
    81,231.12x = 121,831.80 × 36,847.20
  4. Step 4: Simplify right side
    81,231.12x = 4,489,160,700.96
  5. Step 5: Solve for x
    x = 4,489,160,700.96/81,231.12
  6. Step 6: Final answer
    x = 55,264.05

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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.