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Finding the Fourth Proportional to 172,859.47, 238,461.26 and 115,512.87

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Solution

The fourth proportional to 172,859.47, 238,461.26 and 115,512.87 is: 159,351.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,859.47 : 238,461.26 = 115,512.87 : x
  2. Step 2: Convert to fraction form
    172,859.47/238,461.26 = 115,512.87/x
  3. Step 3: Cross multiply
    172,859.47x = 238,461.26 × 115,512.87
  4. Step 4: Simplify right side
    172,859.47x = 27,545,344,815.20
  5. Step 5: Solve for x
    x = 27,545,344,815.20/172,859.47
  6. Step 6: Final answer
    x = 159,351.09

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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.