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Finding the Fourth Proportional to 138,413.60, 207,620.40 and 124,854.20

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Solution

The fourth proportional to 138,413.60, 207,620.40 and 124,854.20 is: 187,281.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,413.60 : 207,620.40 = 124,854.20 : x
  2. Step 2: Convert to fraction form
    138,413.60/207,620.40 = 124,854.20/x
  3. Step 3: Cross multiply
    138,413.60x = 207,620.40 × 124,854.20
  4. Step 4: Simplify right side
    138,413.60x = 25,922,278,945.68
  5. Step 5: Solve for x
    x = 25,922,278,945.68/138,413.60
  6. Step 6: Final answer
    x = 187,281.30

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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.