Home / 215,912.34-323,878.23-66,141.72

Finding the Fourth Proportional to 215,912.34, 323,878.23 and 66,141.72

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Solution

The fourth proportional to 215,912.34, 323,878.23 and 66,141.72 is: 99,215.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,912.34 : 323,878.23 = 66,141.72 : x
  2. Step 2: Convert to fraction form
    215,912.34/323,878.23 = 66,141.72/x
  3. Step 3: Cross multiply
    215,912.34x = 323,878.23 × 66,141.72
  4. Step 4: Simplify right side
    215,912.34x = 21,421,863,202.76
  5. Step 5: Solve for x
    x = 21,421,863,202.76/215,912.34
  6. Step 6: Final answer
    x = 99,215.56

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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.