Home / 78,223.20-107,947.68-42,413.04

Finding the Fourth Proportional to 78,223.20, 107,947.68 and 42,413.04

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Solution

The fourth proportional to 78,223.20, 107,947.68 and 42,413.04 is: 58,529.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,223.20 : 107,947.68 = 42,413.04 : x
  2. Step 2: Convert to fraction form
    78,223.20/107,947.68 = 42,413.04/x
  3. Step 3: Cross multiply
    78,223.20x = 107,947.68 × 42,413.04
  4. Step 4: Simplify right side
    78,223.20x = 4,578,389,269.75
  5. Step 5: Solve for x
    x = 4,578,389,269.75/78,223.20
  6. Step 6: Final answer
    x = 58,529.81

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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.