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Finding the Fourth Proportional to 73,167.90, 109,739.08 and 20,564.88

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Solution

The fourth proportional to 73,167.90, 109,739.08 and 20,564.88 is: 30,843.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,167.90 : 109,739.08 = 20,564.88 : x
  2. Step 2: Convert to fraction form
    73,167.90/109,739.08 = 20,564.88/x
  3. Step 3: Cross multiply
    73,167.90x = 109,739.08 × 20,564.88
  4. Step 4: Simplify right side
    73,167.90x = 2,256,771,011.51
  5. Step 5: Solve for x
    x = 2,256,771,011.51/73,167.90
  6. Step 6: Final answer
    x = 30,843.73

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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.