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Finding the Fourth Proportional to 61,190.60, 91,788.15 and 16,820.82

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Solution

The fourth proportional to 61,190.60, 91,788.15 and 16,820.82 is: 25,231.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,190.60 : 91,788.15 = 16,820.82 : x
  2. Step 2: Convert to fraction form
    61,190.60/91,788.15 = 16,820.82/x
  3. Step 3: Cross multiply
    61,190.60x = 91,788.15 × 16,820.82
  4. Step 4: Simplify right side
    61,190.60x = 1,543,951,949.28
  5. Step 5: Solve for x
    x = 1,543,951,949.28/61,190.60
  6. Step 6: Final answer
    x = 25,231.85

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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.