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Finding the Fourth Proportional to 72,105.17, 108,163.92 and 18,804.23

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Solution

The fourth proportional to 72,105.17, 108,163.92 and 18,804.23 is: 28,207.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,105.17 : 108,163.92 = 18,804.23 : x
  2. Step 2: Convert to fraction form
    72,105.17/108,163.92 = 18,804.23/x
  3. Step 3: Cross multiply
    72,105.17x = 108,163.92 × 18,804.23
  4. Step 4: Simplify right side
    72,105.17x = 2,033,939,773.11
  5. Step 5: Solve for x
    x = 2,033,939,773.11/72,105.17
  6. Step 6: Final answer
    x = 28,207.96

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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.