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Finding the Fourth Proportional to 61,155.28, 91,745.88 and 19,631.44

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Solution

The fourth proportional to 61,155.28, 91,745.88 and 19,631.44 is: 29,451.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,155.28 : 91,745.88 = 19,631.44 : x
  2. Step 2: Convert to fraction form
    61,155.28/91,745.88 = 19,631.44/x
  3. Step 3: Cross multiply
    61,155.28x = 91,745.88 × 19,631.44
  4. Step 4: Simplify right side
    61,155.28x = 1,801,103,738.47
  5. Step 5: Solve for x
    x = 1,801,103,738.47/61,155.28
  6. Step 6: Final answer
    x = 29,451.32

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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.