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Finding the Fourth Proportional to 258,161.98, 387,282.42 and 131,733.28

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Solution

The fourth proportional to 258,161.98, 387,282.42 and 131,733.28 is: 197,620.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,161.98 : 387,282.42 = 131,733.28 : x
  2. Step 2: Convert to fraction form
    258,161.98/387,282.42 = 131,733.28/x
  3. Step 3: Cross multiply
    258,161.98x = 387,282.42 × 131,733.28
  4. Step 4: Simplify right side
    258,161.98x = 51,017,983,472.94
  5. Step 5: Solve for x
    x = 51,017,983,472.94/258,161.98
  6. Step 6: Final answer
    x = 197,620.05

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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.