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Finding the Fourth Proportional to 80,863.68, 121,291.40 and 30,939.94

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Solution

The fourth proportional to 80,863.68, 121,291.40 and 30,939.94 is: 46,408.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,863.68 : 121,291.40 = 30,939.94 : x
  2. Step 2: Convert to fraction form
    80,863.68/121,291.40 = 30,939.94/x
  3. Step 3: Cross multiply
    80,863.68x = 121,291.40 × 30,939.94
  4. Step 4: Simplify right side
    80,863.68x = 3,752,748,638.52
  5. Step 5: Solve for x
    x = 3,752,748,638.52/80,863.68
  6. Step 6: Final answer
    x = 46,408.33

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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.