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Finding the Fourth Proportional to 73,126.71, 109,681.56 and 20,540.70

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Solution

The fourth proportional to 73,126.71, 109,681.56 and 20,540.70 is: 30,808.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,126.71 : 109,681.56 = 20,540.70 : x
  2. Step 2: Convert to fraction form
    73,126.71/109,681.56 = 20,540.70/x
  3. Step 3: Cross multiply
    73,126.71x = 109,681.56 × 20,540.70
  4. Step 4: Simplify right side
    73,126.71x = 2,252,936,019.49
  5. Step 5: Solve for x
    x = 2,252,936,019.49/73,126.71
  6. Step 6: Final answer
    x = 30,808.66

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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.