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Finding the Fourth Proportional to 61,060.31, 91,603.61 and 18,939.54

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Solution

The fourth proportional to 61,060.31, 91,603.61 and 18,939.54 is: 28,413.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,060.31 : 91,603.61 = 18,939.54 : x
  2. Step 2: Convert to fraction form
    61,060.31/91,603.61 = 18,939.54/x
  3. Step 3: Cross multiply
    61,060.31x = 91,603.61 × 18,939.54
  4. Step 4: Simplify right side
    61,060.31x = 1,734,930,141.04
  5. Step 5: Solve for x
    x = 1,734,930,141.04/61,060.31
  6. Step 6: Final answer
    x = 28,413.39

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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.