Home / 81,539.22-122,320.17-28,936.20

Finding the Fourth Proportional to 81,539.22, 122,320.17 and 28,936.20

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Solution

The fourth proportional to 81,539.22, 122,320.17 and 28,936.20 is: 43,408.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,539.22 : 122,320.17 = 28,936.20 : x
  2. Step 2: Convert to fraction form
    81,539.22/122,320.17 = 28,936.20/x
  3. Step 3: Cross multiply
    81,539.22x = 122,320.17 × 28,936.20
  4. Step 4: Simplify right side
    81,539.22x = 3,539,480,903.15
  5. Step 5: Solve for x
    x = 3,539,480,903.15/81,539.22
  6. Step 6: Final answer
    x = 43,408.32

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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.