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Finding the Fourth Proportional to 135,377.73, 186,870.34 and 78,789.11

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Solution

The fourth proportional to 135,377.73, 186,870.34 and 78,789.11 is: 108,757.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,377.73 : 186,870.34 = 78,789.11 : x
  2. Step 2: Convert to fraction form
    135,377.73/186,870.34 = 78,789.11/x
  3. Step 3: Cross multiply
    135,377.73x = 186,870.34 × 78,789.11
  4. Step 4: Simplify right side
    135,377.73x = 14,723,346,938.13
  5. Step 5: Solve for x
    x = 14,723,346,938.13/135,377.73
  6. Step 6: Final answer
    x = 108,757.53

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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.