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Finding the Fourth Proportional to 61,212.20, 91,818.30 and 33,218.60

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Solution

The fourth proportional to 61,212.20, 91,818.30 and 33,218.60 is: 49,827.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,212.20 : 91,818.30 = 33,218.60 : x
  2. Step 2: Convert to fraction form
    61,212.20/91,818.30 = 33,218.60/x
  3. Step 3: Cross multiply
    61,212.20x = 91,818.30 × 33,218.60
  4. Step 4: Simplify right side
    61,212.20x = 3,050,075,380.38
  5. Step 5: Solve for x
    x = 3,050,075,380.38/61,212.20
  6. Step 6: Final answer
    x = 49,827.90

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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.