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Finding the Fourth Proportional to 72,081.60, 108,062.64 and 44,321.28

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Solution

The fourth proportional to 72,081.60, 108,062.64 and 44,321.28 is: 66,445.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,081.60 : 108,062.64 = 44,321.28 : x
  2. Step 2: Convert to fraction form
    72,081.60/108,062.64 = 44,321.28/x
  3. Step 3: Cross multiply
    72,081.60x = 108,062.64 × 44,321.28
  4. Step 4: Simplify right side
    72,081.60x = 4,789,474,524.98
  5. Step 5: Solve for x
    x = 4,789,474,524.98/72,081.60
  6. Step 6: Final answer
    x = 66,445.17

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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.