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Finding the Fourth Proportional to 86,676.78, 119,578.34 and 52,679.79

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Solution

The fourth proportional to 86,676.78, 119,578.34 and 52,679.79 is: 72,676.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,676.78 : 119,578.34 = 52,679.79 : x
  2. Step 2: Convert to fraction form
    86,676.78/119,578.34 = 52,679.79/x
  3. Step 3: Cross multiply
    86,676.78x = 119,578.34 × 52,679.79
  4. Step 4: Simplify right side
    86,676.78x = 6,299,361,576.35
  5. Step 5: Solve for x
    x = 6,299,361,576.35/86,676.78
  6. Step 6: Final answer
    x = 72,676.46

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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.