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Finding the Fourth Proportional to 221,037.68, 331,621.20 and 71,274.93

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Solution

The fourth proportional to 221,037.68, 331,621.20 and 71,274.93 is: 106,933.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,037.68 : 331,621.20 = 71,274.93 : x
  2. Step 2: Convert to fraction form
    221,037.68/331,621.20 = 71,274.93/x
  3. Step 3: Cross multiply
    221,037.68x = 331,621.20 × 71,274.93
  4. Step 4: Simplify right side
    221,037.68x = 23,636,277,816.52
  5. Step 5: Solve for x
    x = 23,636,277,816.52/221,037.68
  6. Step 6: Final answer
    x = 106,933.25

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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.