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Finding the Fourth Proportional to 80,992.58, 121,491.72 and 21,829.68

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Solution

The fourth proportional to 80,992.58, 121,491.72 and 21,829.68 is: 32,745.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,992.58 : 121,491.72 = 21,829.68 : x
  2. Step 2: Convert to fraction form
    80,992.58/121,491.72 = 21,829.68/x
  3. Step 3: Cross multiply
    80,992.58x = 121,491.72 × 21,829.68
  4. Step 4: Simplify right side
    80,992.58x = 2,652,125,370.25
  5. Step 5: Solve for x
    x = 2,652,125,370.25/80,992.58
  6. Step 6: Final answer
    x = 32,745.29

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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.