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Finding the Fourth Proportional to 109,676.74, 151,342.68 and 63,729.22

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Solution

The fourth proportional to 109,676.74, 151,342.68 and 63,729.22 is: 87,939.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,676.74 : 151,342.68 = 63,729.22 : x
  2. Step 2: Convert to fraction form
    109,676.74/151,342.68 = 63,729.22/x
  3. Step 3: Cross multiply
    109,676.74x = 151,342.68 × 63,729.22
  4. Step 4: Simplify right side
    109,676.74x = 9,644,950,949.11
  5. Step 5: Solve for x
    x = 9,644,950,949.11/109,676.74
  6. Step 6: Final answer
    x = 87,939.80

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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.