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Finding the Fourth Proportional to 61,155.56, 91,727.18 and 16,786.78

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Solution

The fourth proportional to 61,155.56, 91,727.18 and 16,786.78 is: 25,178.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,155.56 : 91,727.18 = 16,786.78 : x
  2. Step 2: Convert to fraction form
    61,155.56/91,727.18 = 16,786.78/x
  3. Step 3: Cross multiply
    61,155.56x = 91,727.18 × 16,786.78
  4. Step 4: Simplify right side
    61,155.56x = 1,539,803,990.68
  5. Step 5: Solve for x
    x = 1,539,803,990.68/61,155.56
  6. Step 6: Final answer
    x = 25,178.48

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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.