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Finding the Fourth Proportional to 391,396.34, 587,131.16 and 125,093.45

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Solution

The fourth proportional to 391,396.34, 587,131.16 and 125,093.45 is: 187,651.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,396.34 : 587,131.16 = 125,093.45 : x
  2. Step 2: Convert to fraction form
    391,396.34/587,131.16 = 125,093.45/x
  3. Step 3: Cross multiply
    391,396.34x = 587,131.16 × 125,093.45
  4. Step 4: Simplify right side
    391,396.34x = 73,446,258,845.78
  5. Step 5: Solve for x
    x = 73,446,258,845.78/391,396.34
  6. Step 6: Final answer
    x = 187,651.88

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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.