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Finding the Fourth Proportional to 66,051.70, 99,074.07 and 21,672.61

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Solution

The fourth proportional to 66,051.70, 99,074.07 and 21,672.61 is: 32,507.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,051.70 : 99,074.07 = 21,672.61 : x
  2. Step 2: Convert to fraction form
    66,051.70/99,074.07 = 21,672.61/x
  3. Step 3: Cross multiply
    66,051.70x = 99,074.07 × 21,672.61
  4. Step 4: Simplify right side
    66,051.70x = 2,147,193,680.22
  5. Step 5: Solve for x
    x = 2,147,193,680.22/66,051.70
  6. Step 6: Final answer
    x = 32,507.77

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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.