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Finding the Fourth Proportional to 61,211.20, 91,819.14 and 21,773.92

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Solution

The fourth proportional to 61,211.20, 91,819.14 and 21,773.92 is: 32,661.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,211.20 : 91,819.14 = 21,773.92 : x
  2. Step 2: Convert to fraction form
    61,211.20/91,819.14 = 21,773.92/x
  3. Step 3: Cross multiply
    61,211.20x = 91,819.14 × 21,773.92
  4. Step 4: Simplify right side
    61,211.20x = 1,999,262,608.83
  5. Step 5: Solve for x
    x = 1,999,262,608.83/61,211.20
  6. Step 6: Final answer
    x = 32,661.71

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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.