Home / 135,408.11-186,841.18-78,049.78

Finding the Fourth Proportional to 135,408.11, 186,841.18 and 78,049.78

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Solution

The fourth proportional to 135,408.11, 186,841.18 and 78,049.78 is: 107,696.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,408.11 : 186,841.18 = 78,049.78 : x
  2. Step 2: Convert to fraction form
    135,408.11/186,841.18 = 78,049.78/x
  3. Step 3: Cross multiply
    135,408.11x = 186,841.18 × 78,049.78
  4. Step 4: Simplify right side
    135,408.11x = 14,582,912,624.40
  5. Step 5: Solve for x
    x = 14,582,912,624.40/135,408.11
  6. Step 6: Final answer
    x = 107,696.01

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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.