Home / 258,165.72-387,238.86-71,172.36

Finding the Fourth Proportional to 258,165.72, 387,238.86 and 71,172.36

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Solution

The fourth proportional to 258,165.72, 387,238.86 and 71,172.36 is: 106,755.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,165.72 : 387,238.86 = 71,172.36 : x
  2. Step 2: Convert to fraction form
    258,165.72/387,238.86 = 71,172.36/x
  3. Step 3: Cross multiply
    258,165.72x = 387,238.86 × 71,172.36
  4. Step 4: Simplify right side
    258,165.72x = 27,560,703,549.91
  5. Step 5: Solve for x
    x = 27,560,703,549.91/258,165.72
  6. Step 6: Final answer
    x = 106,755.86

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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.