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Finding the Fourth Proportional to 73,790.60, 110,671.14 and 21,187.76

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Solution

The fourth proportional to 73,790.60, 110,671.14 and 21,187.76 is: 31,777.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,790.60 : 110,671.14 = 21,187.76 : x
  2. Step 2: Convert to fraction form
    73,790.60/110,671.14 = 21,187.76/x
  3. Step 3: Cross multiply
    73,790.60x = 110,671.14 × 21,187.76
  4. Step 4: Simplify right side
    73,790.60x = 2,344,873,553.25
  5. Step 5: Solve for x
    x = 2,344,873,553.25/73,790.60
  6. Step 6: Final answer
    x = 31,777.40

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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.