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Finding the Fourth Proportional to 321,738.60, 482,462.10 and 121,992.60

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Solution

The fourth proportional to 321,738.60, 482,462.10 and 121,992.60 is: 182,933.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,738.60 : 482,462.10 = 121,992.60 : x
  2. Step 2: Convert to fraction form
    321,738.60/482,462.10 = 121,992.60/x
  3. Step 3: Cross multiply
    321,738.60x = 482,462.10 × 121,992.60
  4. Step 4: Simplify right side
    321,738.60x = 58,856,805,980.46
  5. Step 5: Solve for x
    x = 58,856,805,980.46/321,738.60
  6. Step 6: Final answer
    x = 182,933.62

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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.