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Finding the Fourth Proportional to 321,205.29, 481,643.88 and 118,791.15

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Solution

The fourth proportional to 321,205.29, 481,643.88 and 118,791.15 is: 178,126.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,205.29 : 481,643.88 = 118,791.15 : x
  2. Step 2: Convert to fraction form
    321,205.29/481,643.88 = 118,791.15/x
  3. Step 3: Cross multiply
    321,205.29x = 481,643.88 × 118,791.15
  4. Step 4: Simplify right side
    321,205.29x = 57,215,030,395.66
  5. Step 5: Solve for x
    x = 57,215,030,395.66/321,205.29
  6. Step 6: Final answer
    x = 178,126.05

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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.