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Finding the Fourth Proportional to 68,960.40, 103,367.09 and 39,314.40

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Solution

The fourth proportional to 68,960.40, 103,367.09 and 39,314.40 is: 58,929.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,960.40 : 103,367.09 = 39,314.40 : x
  2. Step 2: Convert to fraction form
    68,960.40/103,367.09 = 39,314.40/x
  3. Step 3: Cross multiply
    68,960.40x = 103,367.09 × 39,314.40
  4. Step 4: Simplify right side
    68,960.40x = 4,063,814,409.69
  5. Step 5: Solve for x
    x = 4,063,814,409.69/68,960.40
  6. Step 6: Final answer
    x = 58,929.69

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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.