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Finding the Fourth Proportional to 228,388.68, 315,143.38 and 126,413.90

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Solution

The fourth proportional to 228,388.68, 315,143.38 and 126,413.90 is: 174,432.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,388.68 : 315,143.38 = 126,413.90 : x
  2. Step 2: Convert to fraction form
    228,388.68/315,143.38 = 126,413.90/x
  3. Step 3: Cross multiply
    228,388.68x = 315,143.38 × 126,413.90
  4. Step 4: Simplify right side
    228,388.68x = 39,838,502,979.86
  5. Step 5: Solve for x
    x = 39,838,502,979.86/228,388.68
  6. Step 6: Final answer
    x = 174,432.91

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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.