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Finding the Fourth Proportional to 73,131.89, 109,701.90 and 20,537.25

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Solution

The fourth proportional to 73,131.89, 109,701.90 and 20,537.25 is: 30,807.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,131.89 : 109,701.90 = 20,537.25 : x
  2. Step 2: Convert to fraction form
    73,131.89/109,701.90 = 20,537.25/x
  3. Step 3: Cross multiply
    73,131.89x = 109,701.90 × 20,537.25
  4. Step 4: Simplify right side
    73,131.89x = 2,252,975,345.78
  5. Step 5: Solve for x
    x = 2,252,975,345.78/73,131.89
  6. Step 6: Final answer
    x = 30,807.02

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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.