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Finding the Fourth Proportional to 73,966.80, 110,953.80 and 20,658.72

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Solution

The fourth proportional to 73,966.80, 110,953.80 and 20,658.72 is: 30,989.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,966.80 : 110,953.80 = 20,658.72 : x
  2. Step 2: Convert to fraction form
    73,966.80/110,953.80 = 20,658.72/x
  3. Step 3: Cross multiply
    73,966.80x = 110,953.80 × 20,658.72
  4. Step 4: Simplify right side
    73,966.80x = 2,292,163,487.14
  5. Step 5: Solve for x
    x = 2,292,163,487.14/73,966.80
  6. Step 6: Final answer
    x = 30,989.09

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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.