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Finding the Fourth Proportional to 129,759.96, 194,579.46 and 67,413.72

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Solution

The fourth proportional to 129,759.96, 194,579.46 and 67,413.72 is: 101,089.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,759.96 : 194,579.46 = 67,413.72 : x
  2. Step 2: Convert to fraction form
    129,759.96/194,579.46 = 67,413.72/x
  3. Step 3: Cross multiply
    129,759.96x = 194,579.46 × 67,413.72
  4. Step 4: Simplify right side
    129,759.96x = 13,117,325,234.19
  5. Step 5: Solve for x
    x = 13,117,325,234.19/129,759.96
  6. Step 6: Final answer
    x = 101,089.16

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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.