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Finding the Fourth Proportional to 73,212.80, 109,819.20 and 17,808.80

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Solution

The fourth proportional to 73,212.80, 109,819.20 and 17,808.80 is: 26,713.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,212.80 : 109,819.20 = 17,808.80 : x
  2. Step 2: Convert to fraction form
    73,212.80/109,819.20 = 17,808.80/x
  3. Step 3: Cross multiply
    73,212.80x = 109,819.20 × 17,808.80
  4. Step 4: Simplify right side
    73,212.80x = 1,955,748,168.96
  5. Step 5: Solve for x
    x = 1,955,748,168.96/73,212.80
  6. Step 6: Final answer
    x = 26,713.20

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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.