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Finding the Fourth Proportional to 66,581.56, 99,872.72 and 22,208.18

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Solution

The fourth proportional to 66,581.56, 99,872.72 and 22,208.18 is: 33,312.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,581.56 : 99,872.72 = 22,208.18 : x
  2. Step 2: Convert to fraction form
    66,581.56/99,872.72 = 22,208.18/x
  3. Step 3: Cross multiply
    66,581.56x = 99,872.72 × 22,208.18
  4. Step 4: Simplify right side
    66,581.56x = 2,217,991,720.86
  5. Step 5: Solve for x
    x = 2,217,991,720.86/66,581.56
  6. Step 6: Final answer
    x = 33,312.40

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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.