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Finding the Fourth Proportional to 258,491.94, 356,691.60 and 143,751.96

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Solution

The fourth proportional to 258,491.94, 356,691.60 and 143,751.96 is: 198,362.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,491.94 : 356,691.60 = 143,751.96 : x
  2. Step 2: Convert to fraction form
    258,491.94/356,691.60 = 143,751.96/x
  3. Step 3: Cross multiply
    258,491.94x = 356,691.60 × 143,751.96
  4. Step 4: Simplify right side
    258,491.94x = 51,275,116,615.54
  5. Step 5: Solve for x
    x = 51,275,116,615.54/258,491.94
  6. Step 6: Final answer
    x = 198,362.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.