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Finding the Fourth Proportional to 81,618.36, 122,411.42 and 22,438.76

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Solution

The fourth proportional to 81,618.36, 122,411.42 and 22,438.76 is: 33,653.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,618.36 : 122,411.42 = 22,438.76 : x
  2. Step 2: Convert to fraction form
    81,618.36/122,411.42 = 22,438.76/x
  3. Step 3: Cross multiply
    81,618.36x = 122,411.42 × 22,438.76
  4. Step 4: Simplify right side
    81,618.36x = 2,746,760,474.64
  5. Step 5: Solve for x
    x = 2,746,760,474.64/81,618.36
  6. Step 6: Final answer
    x = 33,653.71

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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.