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Finding the Fourth Proportional to 81,717.66, 122,601.11 and 29,120.31

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Solution

The fourth proportional to 81,717.66, 122,601.11 and 29,120.31 is: 43,689.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,717.66 : 122,601.11 = 29,120.31 : x
  2. Step 2: Convert to fraction form
    81,717.66/122,601.11 = 29,120.31/x
  3. Step 3: Cross multiply
    81,717.66x = 122,601.11 × 29,120.31
  4. Step 4: Simplify right side
    81,717.66x = 3,570,182,183.94
  5. Step 5: Solve for x
    x = 3,570,182,183.94/81,717.66
  6. Step 6: Final answer
    x = 43,689.24

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1.5x scale

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.