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Finding the Fourth Proportional to 68,674.16, 103,027.30 and 21,286.77

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Solution

The fourth proportional to 68,674.16, 103,027.30 and 21,286.77 is: 31,935.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,674.16 : 103,027.30 = 21,286.77 : x
  2. Step 2: Convert to fraction form
    68,674.16/103,027.30 = 21,286.77/x
  3. Step 3: Cross multiply
    68,674.16x = 103,027.30 × 21,286.77
  4. Step 4: Simplify right side
    68,674.16x = 2,193,118,438.82
  5. Step 5: Solve for x
    x = 2,193,118,438.82/68,674.16
  6. Step 6: Final answer
    x = 31,935.13

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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.