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Finding the Fourth Proportional to 66,496.20, 99,722.70 and 22,115.40

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Solution

The fourth proportional to 66,496.20, 99,722.70 and 22,115.40 is: 33,165.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,496.20 : 99,722.70 = 22,115.40 : x
  2. Step 2: Convert to fraction form
    66,496.20/99,722.70 = 22,115.40/x
  3. Step 3: Cross multiply
    66,496.20x = 99,722.70 × 22,115.40
  4. Step 4: Simplify right side
    66,496.20x = 2,205,407,399.58
  5. Step 5: Solve for x
    x = 2,205,407,399.58/66,496.20
  6. Step 6: Final answer
    x = 33,165.92

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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.