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Finding the Fourth Proportional to 71,556.88, 107,215.92 and 31,516.24

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Solution

The fourth proportional to 71,556.88, 107,215.92 and 31,516.24 is: 47,221.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,556.88 : 107,215.92 = 31,516.24 : x
  2. Step 2: Convert to fraction form
    71,556.88/107,215.92 = 31,516.24/x
  3. Step 3: Cross multiply
    71,556.88x = 107,215.92 × 31,516.24
  4. Step 4: Simplify right side
    71,556.88x = 3,379,042,666.54
  5. Step 5: Solve for x
    x = 3,379,042,666.54/71,556.88
  6. Step 6: Final answer
    x = 47,221.77

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1.5x scale

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.