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Finding the Fourth Proportional to 221,099.10, 331,695.87 and 71,347.90

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Solution

The fourth proportional to 221,099.10, 331,695.87 and 71,347.90 is: 107,037.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,099.10 : 331,695.87 = 71,347.90 : x
  2. Step 2: Convert to fraction form
    221,099.10/331,695.87 = 71,347.90/x
  3. Step 3: Cross multiply
    221,099.10x = 331,695.87 × 71,347.90
  4. Step 4: Simplify right side
    221,099.10x = 23,665,803,763.17
  5. Step 5: Solve for x
    x = 23,665,803,763.17/221,099.10
  6. Step 6: Final answer
    x = 107,037.09

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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.