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Finding the Fourth Proportional to 81,379.44, 112,296 and 47,386.44

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Solution

The fourth proportional to 81,379.44, 112,296 and 47,386.44 is: 65,388.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,379.44 : 112,296 = 47,386.44 : x
  2. Step 2: Convert to fraction form
    81,379.44/112,296 = 47,386.44/x
  3. Step 3: Cross multiply
    81,379.44x = 112,296 × 47,386.44
  4. Step 4: Simplify right side
    81,379.44x = 5,321,307,666.24
  5. Step 5: Solve for x
    x = 5,321,307,666.24/81,379.44
  6. Step 6: Final answer
    x = 65,388.85

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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.