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Finding the Fourth Proportional to 66,608.33, 99,899.53 and 19,220.09

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Solution

The fourth proportional to 66,608.33, 99,899.53 and 19,220.09 is: 28,826.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,608.33 : 99,899.53 = 19,220.09 : x
  2. Step 2: Convert to fraction form
    66,608.33/99,899.53 = 19,220.09/x
  3. Step 3: Cross multiply
    66,608.33x = 99,899.53 × 19,220.09
  4. Step 4: Simplify right side
    66,608.33x = 1,920,077,410.01
  5. Step 5: Solve for x
    x = 1,920,077,410.01/66,608.33
  6. Step 6: Final answer
    x = 28,826.39

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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.