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Finding the Fourth Proportional to 61,286.40, 91,940.40 and 21,866.40

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Solution

The fourth proportional to 61,286.40, 91,940.40 and 21,866.40 is: 32,803.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,286.40 : 91,940.40 = 21,866.40 : x
  2. Step 2: Convert to fraction form
    61,286.40/91,940.40 = 21,866.40/x
  3. Step 3: Cross multiply
    61,286.40x = 91,940.40 × 21,866.40
  4. Step 4: Simplify right side
    61,286.40x = 2,010,405,562.56
  5. Step 5: Solve for x
    x = 2,010,405,562.56/61,286.40
  6. Step 6: Final answer
    x = 32,803.45

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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.