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Finding the Fourth Proportional to 135,381.73, 186,875.85 and 78,793.12

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Solution

The fourth proportional to 135,381.73, 186,875.85 and 78,793.12 is: 108,763.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,381.73 : 186,875.85 = 78,793.12 : x
  2. Step 2: Convert to fraction form
    135,381.73/186,875.85 = 78,793.12/x
  3. Step 3: Cross multiply
    135,381.73x = 186,875.85 × 78,793.12
  4. Step 4: Simplify right side
    135,381.73x = 14,724,531,274.15
  5. Step 5: Solve for x
    x = 14,724,531,274.15/135,381.73
  6. Step 6: Final answer
    x = 108,763.06

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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.