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Finding the Fourth Proportional to 81,609.40, 122,406.90 and 22,439.80

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Solution

The fourth proportional to 81,609.40, 122,406.90 and 22,439.80 is: 33,657.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,609.40 : 122,406.90 = 22,439.80 : x
  2. Step 2: Convert to fraction form
    81,609.40/122,406.90 = 22,439.80/x
  3. Step 3: Cross multiply
    81,609.40x = 122,406.90 × 22,439.80
  4. Step 4: Simplify right side
    81,609.40x = 2,746,786,354.62
  5. Step 5: Solve for x
    x = 2,746,786,354.62/81,609.40
  6. Step 6: Final answer
    x = 33,657.72

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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.