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Finding the Fourth Proportional to 66,487.97, 99,741.90 and 21,494.27

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Solution

The fourth proportional to 66,487.97, 99,741.90 and 21,494.27 is: 32,244.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,487.97 : 99,741.90 = 21,494.27 : x
  2. Step 2: Convert to fraction form
    66,487.97/99,741.90 = 21,494.27/x
  3. Step 3: Cross multiply
    66,487.97x = 99,741.90 × 21,494.27
  4. Step 4: Simplify right side
    66,487.97x = 2,143,879,328.91
  5. Step 5: Solve for x
    x = 2,143,879,328.91/66,487.97
  6. Step 6: Final answer
    x = 32,244.62

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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.