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Finding the Fourth Proportional to 76,947.50, 106,187.70 and 43,413.50

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Solution

The fourth proportional to 76,947.50, 106,187.70 and 43,413.50 is: 59,910.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,947.50 : 106,187.70 = 43,413.50 : x
  2. Step 2: Convert to fraction form
    76,947.50/106,187.70 = 43,413.50/x
  3. Step 3: Cross multiply
    76,947.50x = 106,187.70 × 43,413.50
  4. Step 4: Simplify right side
    76,947.50x = 4,609,979,713.95
  5. Step 5: Solve for x
    x = 4,609,979,713.95/76,947.50
  6. Step 6: Final answer
    x = 59,910.71

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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.