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Finding the Fourth Proportional to 73,131.51, 109,701.51 and 20,545.09

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Solution

The fourth proportional to 73,131.51, 109,701.51 and 20,545.09 is: 30,818.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,131.51 : 109,701.51 = 20,545.09 : x
  2. Step 2: Convert to fraction form
    73,131.51/109,701.51 = 20,545.09/x
  3. Step 3: Cross multiply
    73,131.51x = 109,701.51 × 20,545.09
  4. Step 4: Simplify right side
    73,131.51x = 2,253,827,396.09
  5. Step 5: Solve for x
    x = 2,253,827,396.09/73,131.51
  6. Step 6: Final answer
    x = 30,818.83

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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.