Home / 81,233.52-121,860-28,632.12

Finding the Fourth Proportional to 81,233.52, 121,860 and 28,632.12

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Solution

The fourth proportional to 81,233.52, 121,860 and 28,632.12 is: 42,951.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,233.52 : 121,860 = 28,632.12 : x
  2. Step 2: Convert to fraction form
    81,233.52/121,860 = 28,632.12/x
  3. Step 3: Cross multiply
    81,233.52x = 121,860 × 28,632.12
  4. Step 4: Simplify right side
    81,233.52x = 3,489,110,143.20
  5. Step 5: Solve for x
    x = 3,489,110,143.20/81,233.52
  6. Step 6: Final answer
    x = 42,951.61

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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.