Home / 129,413.03-178,589.61-72,824.40

Finding the Fourth Proportional to 129,413.03, 178,589.61 and 72,824.40

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Solution

The fourth proportional to 129,413.03, 178,589.61 and 72,824.40 is: 100,497.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,413.03 : 178,589.61 = 72,824.40 : x
  2. Step 2: Convert to fraction form
    129,413.03/178,589.61 = 72,824.40/x
  3. Step 3: Cross multiply
    129,413.03x = 178,589.61 × 72,824.40
  4. Step 4: Simplify right side
    129,413.03x = 13,005,681,194.48
  5. Step 5: Solve for x
    x = 13,005,681,194.48/129,413.03
  6. Step 6: Final answer
    x = 100,497.47

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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.