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Finding the Fourth Proportional to 221,047.70, 331,636.23 and 71,284.95

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Solution

The fourth proportional to 221,047.70, 331,636.23 and 71,284.95 is: 106,948.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,047.70 : 331,636.23 = 71,284.95 : x
  2. Step 2: Convert to fraction form
    221,047.70/331,636.23 = 71,284.95/x
  3. Step 3: Cross multiply
    221,047.70x = 331,636.23 × 71,284.95
  4. Step 4: Simplify right side
    221,047.70x = 23,640,672,073.74
  5. Step 5: Solve for x
    x = 23,640,672,073.74/221,047.70
  6. Step 6: Final answer
    x = 106,948.29

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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.