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Finding the Fourth Proportional to 221,212.79, 331,608.95 and 141,025.71

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Solution

The fourth proportional to 221,212.79, 331,608.95 and 141,025.71 is: 211,404.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,212.79 : 331,608.95 = 141,025.71 : x
  2. Step 2: Convert to fraction form
    221,212.79/331,608.95 = 141,025.71/x
  3. Step 3: Cross multiply
    221,212.79x = 331,608.95 × 141,025.71
  4. Step 4: Simplify right side
    221,212.79x = 46,765,386,910.98
  5. Step 5: Solve for x
    x = 46,765,386,910.98/221,212.79
  6. Step 6: Final answer
    x = 211,404.54

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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.