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Finding the Fourth Proportional to 66,207.81, 99,290.63 and 21,826.29

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Solution

The fourth proportional to 66,207.81, 99,290.63 and 21,826.29 is: 32,732.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,207.81 : 99,290.63 = 21,826.29 : x
  2. Step 2: Convert to fraction form
    66,207.81/99,290.63 = 21,826.29/x
  3. Step 3: Cross multiply
    66,207.81x = 99,290.63 × 21,826.29
  4. Step 4: Simplify right side
    66,207.81x = 2,167,145,975.53
  5. Step 5: Solve for x
    x = 2,167,145,975.53/66,207.81
  6. Step 6: Final answer
    x = 32,732.48

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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.