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Finding the Fourth Proportional to 67,130.28, 100,697.66 and 20,383

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Solution

The fourth proportional to 67,130.28, 100,697.66 and 20,383 is: 30,575.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,130.28 : 100,697.66 = 20,383 : x
  2. Step 2: Convert to fraction form
    67,130.28/100,697.66 = 20,383/x
  3. Step 3: Cross multiply
    67,130.28x = 100,697.66 × 20,383
  4. Step 4: Simplify right side
    67,130.28x = 2,052,520,403.78
  5. Step 5: Solve for x
    x = 2,052,520,403.78/67,130.28
  6. Step 6: Final answer
    x = 30,575.18

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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.