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Finding the Fourth Proportional to 68,872.19, 103,209.86 and 39,228.82

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Solution

The fourth proportional to 68,872.19, 103,209.86 and 39,228.82 is: 58,787.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,872.19 : 103,209.86 = 39,228.82 : x
  2. Step 2: Convert to fraction form
    68,872.19/103,209.86 = 39,228.82/x
  3. Step 3: Cross multiply
    68,872.19x = 103,209.86 × 39,228.82
  4. Step 4: Simplify right side
    68,872.19x = 4,048,800,860.21
  5. Step 5: Solve for x
    x = 4,048,800,860.21/68,872.19
  6. Step 6: Final answer
    x = 58,787.17

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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.