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Finding the Fourth Proportional to 67,970, 101,955 and 18,722

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Solution

The fourth proportional to 67,970, 101,955 and 18,722 is: 28,083

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,970 : 101,955 = 18,722 : x
  2. Step 2: Convert to fraction form
    67,970/101,955 = 18,722/x
  3. Step 3: Cross multiply
    67,970x = 101,955 × 18,722
  4. Step 4: Simplify right side
    67,970x = 1,908,801,510
  5. Step 5: Solve for x
    x = 1,908,801,510/67,970
  6. Step 6: Final answer
    x = 28,083

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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.