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Finding the Fourth Proportional to 68,976.90, 103,410.68 and 37,812.15

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Solution

The fourth proportional to 68,976.90, 103,410.68 and 37,812.15 is: 56,688.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,976.90 : 103,410.68 = 37,812.15 : x
  2. Step 2: Convert to fraction form
    68,976.90/103,410.68 = 37,812.15/x
  3. Step 3: Cross multiply
    68,976.90x = 103,410.68 × 37,812.15
  4. Step 4: Simplify right side
    68,976.90x = 3,910,179,954.70
  5. Step 5: Solve for x
    x = 3,910,179,954.70/68,976.90
  6. Step 6: Final answer
    x = 56,688.25

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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.