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Finding the Fourth Proportional to 321,709.10, 482,406.42 and 132,118.79

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Solution

The fourth proportional to 321,709.10, 482,406.42 and 132,118.79 is: 198,113.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,709.10 : 482,406.42 = 132,118.79 : x
  2. Step 2: Convert to fraction form
    321,709.10/482,406.42 = 132,118.79/x
  3. Step 3: Cross multiply
    321,709.10x = 482,406.42 × 132,118.79
  4. Step 4: Simplify right side
    321,709.10x = 63,734,952,498.63
  5. Step 5: Solve for x
    x = 63,734,952,498.63/321,709.10
  6. Step 6: Final answer
    x = 198,113.61

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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.