Home / 81,254.20-121,899.52-28,664.12

Finding the Fourth Proportional to 81,254.20, 121,899.52 and 28,664.12

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Solution

The fourth proportional to 81,254.20, 121,899.52 and 28,664.12 is: 43,002.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,254.20 : 121,899.52 = 28,664.12 : x
  2. Step 2: Convert to fraction form
    81,254.20/121,899.52 = 28,664.12/x
  3. Step 3: Cross multiply
    81,254.20x = 121,899.52 × 28,664.12
  4. Step 4: Simplify right side
    81,254.20x = 3,494,142,469.22
  5. Step 5: Solve for x
    x = 3,494,142,469.22/81,254.20
  6. Step 6: Final answer
    x = 43,002.61

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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.