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Finding the Fourth Proportional to 258,700.42, 356,997.54 and 143,975.26

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Solution

The fourth proportional to 258,700.42, 356,997.54 and 143,975.26 is: 198,680.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,700.42 : 356,997.54 = 143,975.26 : x
  2. Step 2: Convert to fraction form
    258,700.42/356,997.54 = 143,975.26/x
  3. Step 3: Cross multiply
    258,700.42x = 356,997.54 × 143,975.26
  4. Step 4: Simplify right side
    258,700.42x = 51,398,813,640.86
  5. Step 5: Solve for x
    x = 51,398,813,640.86/258,700.42
  6. Step 6: Final answer
    x = 198,680.83

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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.