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Finding the Fourth Proportional to 66,257.52, 99,361.92 and 21,871.12

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Solution

The fourth proportional to 66,257.52, 99,361.92 and 21,871.12 is: 32,798.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,257.52 : 99,361.92 = 21,871.12 : x
  2. Step 2: Convert to fraction form
    66,257.52/99,361.92 = 21,871.12/x
  3. Step 3: Cross multiply
    66,257.52x = 99,361.92 × 21,871.12
  4. Step 4: Simplify right side
    66,257.52x = 2,173,156,475.75
  5. Step 5: Solve for x
    x = 2,173,156,475.75/66,257.52
  6. Step 6: Final answer
    x = 32,798.64

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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.