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Finding the Fourth Proportional to 321,779.36, 482,669.64 and 132,107.66

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Solution

The fourth proportional to 321,779.36, 482,669.64 and 132,107.66 is: 198,161.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,779.36 : 482,669.64 = 132,107.66 : x
  2. Step 2: Convert to fraction form
    321,779.36/482,669.64 = 132,107.66/x
  3. Step 3: Cross multiply
    321,779.36x = 482,669.64 × 132,107.66
  4. Step 4: Simplify right side
    321,779.36x = 63,764,356,693.44
  5. Step 5: Solve for x
    x = 63,764,356,693.44/321,779.36
  6. Step 6: Final answer
    x = 198,161.74

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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.