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Finding the Fourth Proportional to 66,321.78, 99,394.92 and 26,832.12

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Solution

The fourth proportional to 66,321.78, 99,394.92 and 26,832.12 is: 40,212.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,321.78 : 99,394.92 = 26,832.12 : x
  2. Step 2: Convert to fraction form
    66,321.78/99,394.92 = 26,832.12/x
  3. Step 3: Cross multiply
    66,321.78x = 99,394.92 × 26,832.12
  4. Step 4: Simplify right side
    66,321.78x = 2,666,976,420.83
  5. Step 5: Solve for x
    x = 2,666,976,420.83/66,321.78
  6. Step 6: Final answer
    x = 40,212.68

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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.