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Finding the Fourth Proportional to 219,832, 329,526.44 and 86,660.72

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Solution

The fourth proportional to 219,832, 329,526.44 and 86,660.72 is: 129,903.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,832 : 329,526.44 = 86,660.72 : x
  2. Step 2: Convert to fraction form
    219,832/329,526.44 = 86,660.72/x
  3. Step 3: Cross multiply
    219,832x = 329,526.44 × 86,660.72
  4. Step 4: Simplify right side
    219,832x = 28,556,998,549.44
  5. Step 5: Solve for x
    x = 28,556,998,549.44/219,832
  6. Step 6: Final answer
    x = 129,903.74

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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.