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Finding the Fourth Proportional to 66,531.72, 99,714 and 33,261

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Solution

The fourth proportional to 66,531.72, 99,714 and 33,261 is: 49,849.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,531.72 : 99,714 = 33,261 : x
  2. Step 2: Convert to fraction form
    66,531.72/99,714 = 33,261/x
  3. Step 3: Cross multiply
    66,531.72x = 99,714 × 33,261
  4. Step 4: Simplify right side
    66,531.72x = 3,316,587,354
  5. Step 5: Solve for x
    x = 3,316,587,354/66,531.72
  6. Step 6: Final answer
    x = 49,849.72

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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.