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Finding the Fourth Proportional to 300,687, 451,057.14 and 79,071

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Solution

The fourth proportional to 300,687, 451,057.14 and 79,071 is: 118,613.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,687 : 451,057.14 = 79,071 : x
  2. Step 2: Convert to fraction form
    300,687/451,057.14 = 79,071/x
  3. Step 3: Cross multiply
    300,687x = 451,057.14 × 79,071
  4. Step 4: Simplify right side
    300,687x = 35,665,539,116.94
  5. Step 5: Solve for x
    x = 35,665,539,116.94/300,687
  6. Step 6: Final answer
    x = 118,613.51

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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.