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Finding the Fourth Proportional to 258,374.82, 356,586.78 and 143,664.90

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Solution

The fourth proportional to 258,374.82, 356,586.78 and 143,664.90 is: 198,273.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,374.82 : 356,586.78 = 143,664.90 : x
  2. Step 2: Convert to fraction form
    258,374.82/356,586.78 = 143,664.90/x
  3. Step 3: Cross multiply
    258,374.82x = 356,586.78 × 143,664.90
  4. Step 4: Simplify right side
    258,374.82x = 51,229,004,090.02
  5. Step 5: Solve for x
    x = 51,229,004,090.02/258,374.82
  6. Step 6: Final answer
    x = 198,273.98

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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.