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Finding the Fourth Proportional to 61,201.20, 91,785.12 and 16,817.44

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Solution

The fourth proportional to 61,201.20, 91,785.12 and 16,817.44 is: 25,221.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,201.20 : 91,785.12 = 16,817.44 : x
  2. Step 2: Convert to fraction form
    61,201.20/91,785.12 = 16,817.44/x
  3. Step 3: Cross multiply
    61,201.20x = 91,785.12 × 16,817.44
  4. Step 4: Simplify right side
    61,201.20x = 1,543,590,748.49
  5. Step 5: Solve for x
    x = 1,543,590,748.49/61,201.20
  6. Step 6: Final answer
    x = 25,221.58

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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.