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Finding the Fourth Proportional to 125,413.92, 173,064.60 and 71,691.84

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Solution

The fourth proportional to 125,413.92, 173,064.60 and 71,691.84 is: 98,930.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,413.92 : 173,064.60 = 71,691.84 : x
  2. Step 2: Convert to fraction form
    125,413.92/173,064.60 = 71,691.84/x
  3. Step 3: Cross multiply
    125,413.92x = 173,064.60 × 71,691.84
  4. Step 4: Simplify right side
    125,413.92x = 12,407,319,612.86
  5. Step 5: Solve for x
    x = 12,407,319,612.86/125,413.92
  6. Step 6: Final answer
    x = 98,930.96

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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.