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Finding the Fourth Proportional to 68,736.61, 103,104.96 and 18,817.12

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Solution

The fourth proportional to 68,736.61, 103,104.96 and 18,817.12 is: 28,225.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,736.61 : 103,104.96 = 18,817.12 : x
  2. Step 2: Convert to fraction form
    68,736.61/103,104.96 = 18,817.12/x
  3. Step 3: Cross multiply
    68,736.61x = 103,104.96 × 18,817.12
  4. Step 4: Simplify right side
    68,736.61x = 1,940,138,404.92
  5. Step 5: Solve for x
    x = 1,940,138,404.92/68,736.61
  6. Step 6: Final answer
    x = 28,225.69

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1.5x scale

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.