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Finding the Fourth Proportional to 71,190.73, 106,786.10 and 18,600.13

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Solution

The fourth proportional to 71,190.73, 106,786.10 and 18,600.13 is: 27,900.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,190.73 : 106,786.10 = 18,600.13 : x
  2. Step 2: Convert to fraction form
    71,190.73/106,786.10 = 18,600.13/x
  3. Step 3: Cross multiply
    71,190.73x = 106,786.10 × 18,600.13
  4. Step 4: Simplify right side
    71,190.73x = 1,986,235,342.19
  5. Step 5: Solve for x
    x = 1,986,235,342.19/71,190.73
  6. Step 6: Final answer
    x = 27,900.20

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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.