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Finding the Fourth Proportional to 135,380.73, 186,874.47 and 78,792.12

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Solution

The fourth proportional to 135,380.73, 186,874.47 and 78,792.12 is: 108,761.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,380.73 : 186,874.47 = 78,792.12 : x
  2. Step 2: Convert to fraction form
    135,380.73/186,874.47 = 78,792.12/x
  3. Step 3: Cross multiply
    135,380.73x = 186,874.47 × 78,792.12
  4. Step 4: Simplify right side
    135,380.73x = 14,724,235,665.18
  5. Step 5: Solve for x
    x = 14,724,235,665.18/135,380.73
  6. Step 6: Final answer
    x = 108,761.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.