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Finding the Fourth Proportional to 172,604.88, 258,786.99 and 76,489.76

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Solution

The fourth proportional to 172,604.88, 258,786.99 and 76,489.76 is: 114,681.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,604.88 : 258,786.99 = 76,489.76 : x
  2. Step 2: Convert to fraction form
    172,604.88/258,786.99 = 76,489.76/x
  3. Step 3: Cross multiply
    172,604.88x = 258,786.99 × 76,489.76
  4. Step 4: Simplify right side
    172,604.88x = 19,794,553,462.29
  5. Step 5: Solve for x
    x = 19,794,553,462.29/172,604.88
  6. Step 6: Final answer
    x = 114,681.31

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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.