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Finding the Fourth Proportional to 81,391.62, 122,106.34 and 25,228.74

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Solution

The fourth proportional to 81,391.62, 122,106.34 and 25,228.74 is: 37,848.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,391.62 : 122,106.34 = 25,228.74 : x
  2. Step 2: Convert to fraction form
    81,391.62/122,106.34 = 25,228.74/x
  3. Step 3: Cross multiply
    81,391.62x = 122,106.34 × 25,228.74
  4. Step 4: Simplify right side
    81,391.62x = 3,080,589,104.21
  5. Step 5: Solve for x
    x = 3,080,589,104.21/81,391.62
  6. Step 6: Final answer
    x = 37,848.97

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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.