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Finding the Fourth Proportional to 66,281.58, 99,396.74 and 21,896.42

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Solution

The fourth proportional to 66,281.58, 99,396.74 and 21,896.42 is: 32,836.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,281.58 : 99,396.74 = 21,896.42 : x
  2. Step 2: Convert to fraction form
    66,281.58/99,396.74 = 21,896.42/x
  3. Step 3: Cross multiply
    66,281.58x = 99,396.74 × 21,896.42
  4. Step 4: Simplify right side
    66,281.58x = 2,176,432,159.21
  5. Step 5: Solve for x
    x = 2,176,432,159.21/66,281.58
  6. Step 6: Final answer
    x = 32,836.15

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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.