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Finding the Fourth Proportional to 61,321.16, 91,993.14 and 21,338.48

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Solution

The fourth proportional to 61,321.16, 91,993.14 and 21,338.48 is: 32,011.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,321.16 : 91,993.14 = 21,338.48 : x
  2. Step 2: Convert to fraction form
    61,321.16/91,993.14 = 21,338.48/x
  3. Step 3: Cross multiply
    61,321.16x = 91,993.14 × 21,338.48
  4. Step 4: Simplify right side
    61,321.16x = 1,962,993,778.03
  5. Step 5: Solve for x
    x = 1,962,993,778.03/61,321.16
  6. Step 6: Final answer
    x = 32,011.69

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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.