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Finding the Fourth Proportional to 91,676.70, 137,493.21 and 51,712.86

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Solution

The fourth proportional to 91,676.70, 137,493.21 and 51,712.86 is: 77,556.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,676.70 : 137,493.21 = 51,712.86 : x
  2. Step 2: Convert to fraction form
    91,676.70/137,493.21 = 51,712.86/x
  3. Step 3: Cross multiply
    91,676.70x = 137,493.21 × 51,712.86
  4. Step 4: Simplify right side
    91,676.70x = 7,110,167,119.68
  5. Step 5: Solve for x
    x = 7,110,167,119.68/91,676.70
  6. Step 6: Final answer
    x = 77,556.97

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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.