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Finding the Fourth Proportional to 73,790.96, 110,670.12 and 21,188.72

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Solution

The fourth proportional to 73,790.96, 110,670.12 and 21,188.72 is: 31,778.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,790.96 : 110,670.12 = 21,188.72 : x
  2. Step 2: Convert to fraction form
    73,790.96/110,670.12 = 21,188.72/x
  3. Step 3: Cross multiply
    73,790.96x = 110,670.12 × 21,188.72
  4. Step 4: Simplify right side
    73,790.96x = 2,344,958,185.05
  5. Step 5: Solve for x
    x = 2,344,958,185.05/73,790.96
  6. Step 6: Final answer
    x = 31,778.39

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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.