Home / 67,860.19-101,778.94-21,109.42

Finding the Fourth Proportional to 67,860.19, 101,778.94 and 21,109.42

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Solution

The fourth proportional to 67,860.19, 101,778.94 and 21,109.42 is: 31,660.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,860.19 : 101,778.94 = 21,109.42 : x
  2. Step 2: Convert to fraction form
    67,860.19/101,778.94 = 21,109.42/x
  3. Step 3: Cross multiply
    67,860.19x = 101,778.94 × 21,109.42
  4. Step 4: Simplify right side
    67,860.19x = 2,148,494,391.61
  5. Step 5: Solve for x
    x = 2,148,494,391.61/67,860.19
  6. Step 6: Final answer
    x = 31,660.60

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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.