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Finding the Fourth Proportional to 66,059.85, 99,100.11 and 21,676.51

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Solution

The fourth proportional to 66,059.85, 99,100.11 and 21,676.51 is: 32,518.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,059.85 : 99,100.11 = 21,676.51 : x
  2. Step 2: Convert to fraction form
    66,059.85/99,100.11 = 21,676.51/x
  3. Step 3: Cross multiply
    66,059.85x = 99,100.11 × 21,676.51
  4. Step 4: Simplify right side
    66,059.85x = 2,148,144,608.65
  5. Step 5: Solve for x
    x = 2,148,144,608.65/66,059.85
  6. Step 6: Final answer
    x = 32,518.16

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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.