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Finding the Fourth Proportional to 73,808.40, 110,694.60 and 21,212.40

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Solution

The fourth proportional to 73,808.40, 110,694.60 and 21,212.40 is: 31,813.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,808.40 : 110,694.60 = 21,212.40 : x
  2. Step 2: Convert to fraction form
    73,808.40/110,694.60 = 21,212.40/x
  3. Step 3: Cross multiply
    73,808.40x = 110,694.60 × 21,212.40
  4. Step 4: Simplify right side
    73,808.40x = 2,348,098,133.04
  5. Step 5: Solve for x
    x = 2,348,098,133.04/73,808.40
  6. Step 6: Final answer
    x = 31,813.43

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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.