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Finding the Fourth Proportional to 124,413.20, 186,619.80 and 109,638.80

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Solution

The fourth proportional to 124,413.20, 186,619.80 and 109,638.80 is: 164,458.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,413.20 : 186,619.80 = 109,638.80 : x
  2. Step 2: Convert to fraction form
    124,413.20/186,619.80 = 109,638.80/x
  3. Step 3: Cross multiply
    124,413.20x = 186,619.80 × 109,638.80
  4. Step 4: Simplify right side
    124,413.20x = 20,460,770,928.24
  5. Step 5: Solve for x
    x = 20,460,770,928.24/124,413.20
  6. Step 6: Final answer
    x = 164,458.20

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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.