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Finding the Fourth Proportional to 67,235.34, 100,850.58 and 20,487

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Solution

The fourth proportional to 67,235.34, 100,850.58 and 20,487 is: 30,729.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,235.34 : 100,850.58 = 20,487 : x
  2. Step 2: Convert to fraction form
    67,235.34/100,850.58 = 20,487/x
  3. Step 3: Cross multiply
    67,235.34x = 100,850.58 × 20,487
  4. Step 4: Simplify right side
    67,235.34x = 2,066,125,832.46
  5. Step 5: Solve for x
    x = 2,066,125,832.46/67,235.34
  6. Step 6: Final answer
    x = 30,729.76

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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.