Home / 81,212.10-121,831.28-25,039.06

Finding the Fourth Proportional to 81,212.10, 121,831.28 and 25,039.06

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Solution

The fourth proportional to 81,212.10, 121,831.28 and 25,039.06 is: 37,562.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,212.10 : 121,831.28 = 25,039.06 : x
  2. Step 2: Convert to fraction form
    81,212.10/121,831.28 = 25,039.06/x
  3. Step 3: Cross multiply
    81,212.10x = 121,831.28 × 25,039.06
  4. Step 4: Simplify right side
    81,212.10x = 3,050,540,729.80
  5. Step 5: Solve for x
    x = 3,050,540,729.80/81,212.10
  6. Step 6: Final answer
    x = 37,562.64

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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.