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Finding the Fourth Proportional to 124,523.75, 171,842.79 and 79,811.75

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Solution

The fourth proportional to 124,523.75, 171,842.79 and 79,811.75 is: 110,140.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,523.75 : 171,842.79 = 79,811.75 : x
  2. Step 2: Convert to fraction form
    124,523.75/171,842.79 = 79,811.75/x
  3. Step 3: Cross multiply
    124,523.75x = 171,842.79 × 79,811.75
  4. Step 4: Simplify right side
    124,523.75x = 13,715,073,794.78
  5. Step 5: Solve for x
    x = 13,715,073,794.78/124,523.75
  6. Step 6: Final answer
    x = 110,140.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.