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Finding the Fourth Proportional to 72,192, 108,238.86 and 44,121.90

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Solution

The fourth proportional to 72,192, 108,238.86 and 44,121.90 is: 66,152.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,192 : 108,238.86 = 44,121.90 : x
  2. Step 2: Convert to fraction form
    72,192/108,238.86 = 44,121.90/x
  3. Step 3: Cross multiply
    72,192x = 108,238.86 × 44,121.90
  4. Step 4: Simplify right side
    72,192x = 4,775,704,157.03
  5. Step 5: Solve for x
    x = 4,775,704,157.03/72,192
  6. Step 6: Final answer
    x = 66,152.82

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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.