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Finding the Fourth Proportional to 71,940.71, 107,910.90 and 19,350.25

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Solution

The fourth proportional to 71,940.71, 107,910.90 and 19,350.25 is: 29,025.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,940.71 : 107,910.90 = 19,350.25 : x
  2. Step 2: Convert to fraction form
    71,940.71/107,910.90 = 19,350.25/x
  3. Step 3: Cross multiply
    71,940.71x = 107,910.90 × 19,350.25
  4. Step 4: Simplify right side
    71,940.71x = 2,088,102,622.95
  5. Step 5: Solve for x
    x = 2,088,102,622.95/71,940.71
  6. Step 6: Final answer
    x = 29,025.33

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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.