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Finding the Fourth Proportional to 221,037.86, 331,621.48 and 71,275.12

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Solution

The fourth proportional to 221,037.86, 331,621.48 and 71,275.12 is: 106,933.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,037.86 : 331,621.48 = 71,275.12 : x
  2. Step 2: Convert to fraction form
    221,037.86/331,621.48 = 71,275.12/x
  3. Step 3: Cross multiply
    221,037.86x = 331,621.48 × 71,275.12
  4. Step 4: Simplify right side
    221,037.86x = 23,636,360,041.62
  5. Step 5: Solve for x
    x = 23,636,360,041.62/221,037.86
  6. Step 6: Final answer
    x = 106,933.54

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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.