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Finding the Fourth Proportional to 68,032.40, 102,050.40 and 21,286.40

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Solution

The fourth proportional to 68,032.40, 102,050.40 and 21,286.40 is: 31,930.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,032.40 : 102,050.40 = 21,286.40 : x
  2. Step 2: Convert to fraction form
    68,032.40/102,050.40 = 21,286.40/x
  3. Step 3: Cross multiply
    68,032.40x = 102,050.40 × 21,286.40
  4. Step 4: Simplify right side
    68,032.40x = 2,172,285,634.56
  5. Step 5: Solve for x
    x = 2,172,285,634.56/68,032.40
  6. Step 6: Final answer
    x = 31,930.16

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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.