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Finding the Fourth Proportional to 219,644.55, 329,341.95 and 86,452.61

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Solution

The fourth proportional to 219,644.55, 329,341.95 and 86,452.61 is: 129,629.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,644.55 : 329,341.95 = 86,452.61 : x
  2. Step 2: Convert to fraction form
    219,644.55/329,341.95 = 86,452.61/x
  3. Step 3: Cross multiply
    219,644.55x = 329,341.95 × 86,452.61
  4. Step 4: Simplify right side
    219,644.55x = 28,472,469,513.28
  5. Step 5: Solve for x
    x = 28,472,469,513.28/219,644.55
  6. Step 6: Final answer
    x = 129,629.76

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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.