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Finding the Fourth Proportional to 391,937.74, 587,843.63 and 107,561.86

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Solution

The fourth proportional to 391,937.74, 587,843.63 and 107,561.86 is: 161,325.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,937.74 : 587,843.63 = 107,561.86 : x
  2. Step 2: Convert to fraction form
    391,937.74/587,843.63 = 107,561.86/x
  3. Step 3: Cross multiply
    391,937.74x = 587,843.63 × 107,561.86
  4. Step 4: Simplify right side
    391,937.74x = 63,229,554,231.95
  5. Step 5: Solve for x
    x = 63,229,554,231.95/391,937.74
  6. Step 6: Final answer
    x = 161,325.51

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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.