Home / 81,850.17-122,831.63-28,542.55

Finding the Fourth Proportional to 81,850.17, 122,831.63 and 28,542.55

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Solution

The fourth proportional to 81,850.17, 122,831.63 and 28,542.55 is: 42,833.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,850.17 : 122,831.63 = 28,542.55 : x
  2. Step 2: Convert to fraction form
    81,850.17/122,831.63 = 28,542.55/x
  3. Step 3: Cross multiply
    81,850.17x = 122,831.63 × 28,542.55
  4. Step 4: Simplify right side
    81,850.17x = 3,505,928,173.87
  5. Step 5: Solve for x
    x = 3,505,928,173.87/81,850.17
  6. Step 6: Final answer
    x = 42,833.49

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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.