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Finding the Fourth Proportional to 61,060.43, 91,603.80 and 18,939.67

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Solution

The fourth proportional to 61,060.43, 91,603.80 and 18,939.67 is: 28,413.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,060.43 : 91,603.80 = 18,939.67 : x
  2. Step 2: Convert to fraction form
    61,060.43/91,603.80 = 18,939.67/x
  3. Step 3: Cross multiply
    61,060.43x = 91,603.80 × 18,939.67
  4. Step 4: Simplify right side
    61,060.43x = 1,734,945,190.03
  5. Step 5: Solve for x
    x = 1,734,945,190.03/61,060.43
  6. Step 6: Final answer
    x = 28,413.58

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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.