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Finding the Fourth Proportional to 73,791.60, 110,672.64 and 21,188.76

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Solution

The fourth proportional to 73,791.60, 110,672.64 and 21,188.76 is: 31,778.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,791.60 : 110,672.64 = 21,188.76 : x
  2. Step 2: Convert to fraction form
    73,791.60/110,672.64 = 21,188.76/x
  3. Step 3: Cross multiply
    73,791.60x = 110,672.64 × 21,188.76
  4. Step 4: Simplify right side
    73,791.60x = 2,345,016,007.53
  5. Step 5: Solve for x
    x = 2,345,016,007.53/73,791.60
  6. Step 6: Final answer
    x = 31,778.90

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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.