Home / 205,371.18-307,355.85-172,128.78

Finding the Fourth Proportional to 205,371.18, 307,355.85 and 172,128.78

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Solution

The fourth proportional to 205,371.18, 307,355.85 and 172,128.78 is: 257,605.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,371.18 : 307,355.85 = 172,128.78 : x
  2. Step 2: Convert to fraction form
    205,371.18/307,355.85 = 172,128.78/x
  3. Step 3: Cross multiply
    205,371.18x = 307,355.85 × 172,128.78
  4. Step 4: Simplify right side
    205,371.18x = 52,904,787,486.36
  5. Step 5: Solve for x
    x = 52,904,787,486.36/205,371.18
  6. Step 6: Final answer
    x = 257,605.70

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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.