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Finding the Fourth Proportional to 71,890.72, 107,672.06 and 63,481.75

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Solution

The fourth proportional to 71,890.72, 107,672.06 and 63,481.75 is: 95,077.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,890.72 : 107,672.06 = 63,481.75 : x
  2. Step 2: Convert to fraction form
    71,890.72/107,672.06 = 63,481.75/x
  3. Step 3: Cross multiply
    71,890.72x = 107,672.06 × 63,481.75
  4. Step 4: Simplify right side
    71,890.72x = 6,835,210,477.50
  5. Step 5: Solve for x
    x = 6,835,210,477.50/71,890.72
  6. Step 6: Final answer
    x = 95,077.79

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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.