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Finding the Fourth Proportional to 172,553.30, 258,807.90 and 128,244.68

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Solution

The fourth proportional to 172,553.30, 258,807.90 and 128,244.68 is: 192,350.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,553.30 : 258,807.90 = 128,244.68 : x
  2. Step 2: Convert to fraction form
    172,553.30/258,807.90 = 128,244.68/x
  3. Step 3: Cross multiply
    172,553.30x = 258,807.90 × 128,244.68
  4. Step 4: Simplify right side
    172,553.30x = 33,190,736,316.97
  5. Step 5: Solve for x
    x = 33,190,736,316.97/172,553.30
  6. Step 6: Final answer
    x = 192,350.63

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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.