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Finding the Fourth Proportional to 81,311.70, 122,006.43 and 63,815.70

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Solution

The fourth proportional to 81,311.70, 122,006.43 and 63,815.70 is: 95,754.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,311.70 : 122,006.43 = 63,815.70 : x
  2. Step 2: Convert to fraction form
    81,311.70/122,006.43 = 63,815.70/x
  3. Step 3: Cross multiply
    81,311.70x = 122,006.43 × 63,815.70
  4. Step 4: Simplify right side
    81,311.70x = 7,785,925,734.95
  5. Step 5: Solve for x
    x = 7,785,925,734.95/81,311.70
  6. Step 6: Final answer
    x = 95,754.06

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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.