Home / 215,865.80-323,770.35-66,121.10

Finding the Fourth Proportional to 215,865.80, 323,770.35 and 66,121.10

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Solution

The fourth proportional to 215,865.80, 323,770.35 and 66,121.10 is: 99,172.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,865.80 : 323,770.35 = 66,121.10 : x
  2. Step 2: Convert to fraction form
    215,865.80/323,770.35 = 66,121.10/x
  3. Step 3: Cross multiply
    215,865.80x = 323,770.35 × 66,121.10
  4. Step 4: Simplify right side
    215,865.80x = 21,408,051,689.39
  5. Step 5: Solve for x
    x = 21,408,051,689.39/215,865.80
  6. Step 6: Final answer
    x = 99,172.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.