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Finding the Fourth Proportional to 551,099.31, 826,679.76 and 172,072.39

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Solution

The fourth proportional to 551,099.31, 826,679.76 and 172,072.39 is: 258,118.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,099.31 : 826,679.76 = 172,072.39 : x
  2. Step 2: Convert to fraction form
    551,099.31/826,679.76 = 172,072.39/x
  3. Step 3: Cross multiply
    551,099.31x = 826,679.76 × 172,072.39
  4. Step 4: Simplify right side
    551,099.31x = 142,248,762,067.83
  5. Step 5: Solve for x
    x = 142,248,762,067.83/551,099.31
  6. Step 6: Final answer
    x = 258,118.20

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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.