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Finding the Fourth Proportional to 81,561.65, 122,245.28 and 34,176.65

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Solution

The fourth proportional to 81,561.65, 122,245.28 and 34,176.65 is: 51,224.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,561.65 : 122,245.28 = 34,176.65 : x
  2. Step 2: Convert to fraction form
    81,561.65/122,245.28 = 34,176.65/x
  3. Step 3: Cross multiply
    81,561.65x = 122,245.28 × 34,176.65
  4. Step 4: Simplify right side
    81,561.65x = 4,177,933,977.83
  5. Step 5: Solve for x
    x = 4,177,933,977.83/81,561.65
  6. Step 6: Final answer
    x = 51,224.25

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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.