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Finding the Fourth Proportional to 258,147.99, 356,231.79 and 143,433.90

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Solution

The fourth proportional to 258,147.99, 356,231.79 and 143,433.90 is: 197,931.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,147.99 : 356,231.79 = 143,433.90 : x
  2. Step 2: Convert to fraction form
    258,147.99/356,231.79 = 143,433.90/x
  3. Step 3: Cross multiply
    258,147.99x = 356,231.79 × 143,433.90
  4. Step 4: Simplify right side
    258,147.99x = 51,095,714,943.68
  5. Step 5: Solve for x
    x = 51,095,714,943.68/258,147.99
  6. Step 6: Final answer
    x = 197,931.87

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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.