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Finding the Fourth Proportional to 172,045.35, 257,942.21 and 115,745.49

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Solution

The fourth proportional to 172,045.35, 257,942.21 and 115,745.49 is: 173,533.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,045.35 : 257,942.21 = 115,745.49 : x
  2. Step 2: Convert to fraction form
    172,045.35/257,942.21 = 115,745.49/x
  3. Step 3: Cross multiply
    172,045.35x = 257,942.21 × 115,745.49
  4. Step 4: Simplify right side
    172,045.35x = 29,855,646,909.41
  5. Step 5: Solve for x
    x = 29,855,646,909.41/172,045.35
  6. Step 6: Final answer
    x = 173,533.59

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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.