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Finding the Fourth Proportional to 228,636.15, 315,514.49 and 126,661.41

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Solution

The fourth proportional to 228,636.15, 315,514.49 and 126,661.41 is: 174,790.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,636.15 : 315,514.49 = 126,661.41 : x
  2. Step 2: Convert to fraction form
    228,636.15/315,514.49 = 126,661.41/x
  3. Step 3: Cross multiply
    228,636.15x = 315,514.49 × 126,661.41
  4. Step 4: Simplify right side
    228,636.15x = 39,963,509,545.52
  5. Step 5: Solve for x
    x = 39,963,509,545.52/228,636.15
  6. Step 6: Final answer
    x = 174,790.86

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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.