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Finding the Fourth Proportional to 81,396.96, 122,107.68 and 28,806.96

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Solution

The fourth proportional to 81,396.96, 122,107.68 and 28,806.96 is: 43,214.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,396.96 : 122,107.68 = 28,806.96 : x
  2. Step 2: Convert to fraction form
    81,396.96/122,107.68 = 28,806.96/x
  3. Step 3: Cross multiply
    81,396.96x = 122,107.68 × 28,806.96
  4. Step 4: Simplify right side
    81,396.96x = 3,517,551,053.45
  5. Step 5: Solve for x
    x = 3,517,551,053.45/81,396.96
  6. Step 6: Final answer
    x = 43,214.77

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1.5x scale

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.