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Finding the Fourth Proportional to 61,060.65, 91,604.04 and 18,939.81

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Solution

The fourth proportional to 61,060.65, 91,604.04 and 18,939.81 is: 28,413.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,060.65 : 91,604.04 = 18,939.81 : x
  2. Step 2: Convert to fraction form
    61,060.65/91,604.04 = 18,939.81/x
  3. Step 3: Cross multiply
    61,060.65x = 91,604.04 × 18,939.81
  4. Step 4: Simplify right side
    61,060.65x = 1,734,963,112.83
  5. Step 5: Solve for x
    x = 1,734,963,112.83/61,060.65
  6. Step 6: Final answer
    x = 28,413.77

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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.