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Finding the Fourth Proportional to 79,550.78, 119,323.46 and 20,387.03

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Solution

The fourth proportional to 79,550.78, 119,323.46 and 20,387.03 is: 30,579.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,550.78 : 119,323.46 = 20,387.03 : x
  2. Step 2: Convert to fraction form
    79,550.78/119,323.46 = 20,387.03/x
  3. Step 3: Cross multiply
    79,550.78x = 119,323.46 × 20,387.03
  4. Step 4: Simplify right side
    79,550.78x = 2,432,650,413.07
  5. Step 5: Solve for x
    x = 2,432,650,413.07/79,550.78
  6. Step 6: Final answer
    x = 30,579.85

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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.