Home / 67,986.40-101,979.68-21,239.52

Finding the Fourth Proportional to 67,986.40, 101,979.68 and 21,239.52

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Solution

The fourth proportional to 67,986.40, 101,979.68 and 21,239.52 is: 31,859.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,986.40 : 101,979.68 = 21,239.52 : x
  2. Step 2: Convert to fraction form
    67,986.40/101,979.68 = 21,239.52/x
  3. Step 3: Cross multiply
    67,986.40x = 101,979.68 × 21,239.52
  4. Step 4: Simplify right side
    67,986.40x = 2,165,999,452.95
  5. Step 5: Solve for x
    x = 2,165,999,452.95/67,986.40
  6. Step 6: Final answer
    x = 31,859.30

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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.