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Finding the Fourth Proportional to 81,005.96, 121,508.60 and 21,847.61

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Solution

The fourth proportional to 81,005.96, 121,508.60 and 21,847.61 is: 32,771.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,005.96 : 121,508.60 = 21,847.61 : x
  2. Step 2: Convert to fraction form
    81,005.96/121,508.60 = 21,847.61/x
  3. Step 3: Cross multiply
    81,005.96x = 121,508.60 × 21,847.61
  4. Step 4: Simplify right side
    81,005.96x = 2,654,671,787.66
  5. Step 5: Solve for x
    x = 2,654,671,787.66/81,005.96
  6. Step 6: Final answer
    x = 32,771.32

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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.