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Finding the Fourth Proportional to 71,963.08, 107,221.09 and 67,939

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Solution

The fourth proportional to 71,963.08, 107,221.09 and 67,939 is: 101,225.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,963.08 : 107,221.09 = 67,939 : x
  2. Step 2: Convert to fraction form
    71,963.08/107,221.09 = 67,939/x
  3. Step 3: Cross multiply
    71,963.08x = 107,221.09 × 67,939
  4. Step 4: Simplify right side
    71,963.08x = 7,284,493,633.51
  5. Step 5: Solve for x
    x = 7,284,493,633.51/71,963.08
  6. Step 6: Final answer
    x = 101,225.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.