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Finding the Fourth Proportional to 325,072.98, 487,488.21 and 111,780.56

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Solution

The fourth proportional to 325,072.98, 487,488.21 and 111,780.56 is: 167,629.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,072.98 : 487,488.21 = 111,780.56 : x
  2. Step 2: Convert to fraction form
    325,072.98/487,488.21 = 111,780.56/x
  3. Step 3: Cross multiply
    325,072.98x = 487,488.21 × 111,780.56
  4. Step 4: Simplify right side
    325,072.98x = 54,491,702,669.76
  5. Step 5: Solve for x
    x = 54,491,702,669.76/325,072.98
  6. Step 6: Final answer
    x = 167,629.14

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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.