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Finding the Fourth Proportional to 79,269.60, 109,310.40 and 55,387.56

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Solution

The fourth proportional to 79,269.60, 109,310.40 and 55,387.56 is: 76,377.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,269.60 : 109,310.40 = 55,387.56 : x
  2. Step 2: Convert to fraction form
    79,269.60/109,310.40 = 55,387.56/x
  3. Step 3: Cross multiply
    79,269.60x = 109,310.40 × 55,387.56
  4. Step 4: Simplify right side
    79,269.60x = 6,054,436,338.62
  5. Step 5: Solve for x
    x = 6,054,436,338.62/79,269.60
  6. Step 6: Final answer
    x = 76,377.78

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1.5x scale

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.