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Finding the Fourth Proportional to 81,610.20, 122,415.30 and 75,705.30

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Solution

The fourth proportional to 81,610.20, 122,415.30 and 75,705.30 is: 113,557.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,610.20 : 122,415.30 = 75,705.30 : x
  2. Step 2: Convert to fraction form
    81,610.20/122,415.30 = 75,705.30/x
  3. Step 3: Cross multiply
    81,610.20x = 122,415.30 × 75,705.30
  4. Step 4: Simplify right side
    81,610.20x = 9,267,487,011.09
  5. Step 5: Solve for x
    x = 9,267,487,011.09/81,610.20
  6. Step 6: Final answer
    x = 113,557.95

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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.