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Finding the Fourth Proportional to 54,139.65, 81,209.46 and 26,413.89

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Solution

The fourth proportional to 54,139.65, 81,209.46 and 26,413.89 is: 39,620.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,139.65 : 81,209.46 = 26,413.89 : x
  2. Step 2: Convert to fraction form
    54,139.65/81,209.46 = 26,413.89/x
  3. Step 3: Cross multiply
    54,139.65x = 81,209.46 × 26,413.89
  4. Step 4: Simplify right side
    54,139.65x = 2,145,057,743.40
  5. Step 5: Solve for x
    x = 2,145,057,743.40/54,139.65
  6. Step 6: Final answer
    x = 39,620.83

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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.