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Finding the Fourth Proportional to 120,781.76, 166,694.20 and 73,035.45

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Solution

The fourth proportional to 120,781.76, 166,694.20 and 73,035.45 is: 100,798.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,781.76 : 166,694.20 = 73,035.45 : x
  2. Step 2: Convert to fraction form
    120,781.76/166,694.20 = 73,035.45/x
  3. Step 3: Cross multiply
    120,781.76x = 166,694.20 × 73,035.45
  4. Step 4: Simplify right side
    120,781.76x = 12,174,585,668.80
  5. Step 5: Solve for x
    x = 12,174,585,668.80/120,781.76
  6. Step 6: Final answer
    x = 100,798.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.