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Finding the Fourth Proportional to 52,872, 79,308 and 20,040

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Solution

The fourth proportional to 52,872, 79,308 and 20,040 is: 30,060

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,872 : 79,308 = 20,040 : x
  2. Step 2: Convert to fraction form
    52,872/79,308 = 20,040/x
  3. Step 3: Cross multiply
    52,872x = 79,308 × 20,040
  4. Step 4: Simplify right side
    52,872x = 1,589,332,320
  5. Step 5: Solve for x
    x = 1,589,332,320/52,872
  6. Step 6: Final answer
    x = 30,060

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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.