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Finding the Fourth Proportional to 61,205.20, 91,807.80 and 33,211.60

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Solution

The fourth proportional to 61,205.20, 91,807.80 and 33,211.60 is: 49,817.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,205.20 : 91,807.80 = 33,211.60 : x
  2. Step 2: Convert to fraction form
    61,205.20/91,807.80 = 33,211.60/x
  3. Step 3: Cross multiply
    61,205.20x = 91,807.80 × 33,211.60
  4. Step 4: Simplify right side
    61,205.20x = 3,049,083,930.48
  5. Step 5: Solve for x
    x = 3,049,083,930.48/61,205.20
  6. Step 6: Final answer
    x = 49,817.40

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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.