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Finding the Fourth Proportional to 73,968.55, 110,956.43 and 20,660.47

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Solution

The fourth proportional to 73,968.55, 110,956.43 and 20,660.47 is: 30,991.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,968.55 : 110,956.43 = 20,660.47 : x
  2. Step 2: Convert to fraction form
    73,968.55/110,956.43 = 20,660.47/x
  3. Step 3: Cross multiply
    73,968.55x = 110,956.43 × 20,660.47
  4. Step 4: Simplify right side
    73,968.55x = 2,292,411,993.32
  5. Step 5: Solve for x
    x = 2,292,411,993.32/73,968.55
  6. Step 6: Final answer
    x = 30,991.71

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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.