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Finding the Fourth Proportional to 71,920.52, 107,917.22 and 47,921.23

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Solution

The fourth proportional to 71,920.52, 107,917.22 and 47,921.23 is: 71,906.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,920.52 : 107,917.22 = 47,921.23 : x
  2. Step 2: Convert to fraction form
    71,920.52/107,917.22 = 47,921.23/x
  3. Step 3: Cross multiply
    71,920.52x = 107,917.22 × 47,921.23
  4. Step 4: Simplify right side
    71,920.52x = 5,171,525,298.69
  5. Step 5: Solve for x
    x = 5,171,525,298.69/71,920.52
  6. Step 6: Final answer
    x = 71,906.12

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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.