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Finding the Fourth Proportional to 42,449.68, 63,362.90 and 39,322

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Solution

The fourth proportional to 42,449.68, 63,362.90 and 39,322 is: 58,694.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,449.68 : 63,362.90 = 39,322 : x
  2. Step 2: Convert to fraction form
    42,449.68/63,362.90 = 39,322/x
  3. Step 3: Cross multiply
    42,449.68x = 63,362.90 × 39,322
  4. Step 4: Simplify right side
    42,449.68x = 2,491,555,953.80
  5. Step 5: Solve for x
    x = 2,491,555,953.80/42,449.68
  6. Step 6: Final answer
    x = 58,694.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.