Home / 67,870.62-101,819.21-20,489.58

Finding the Fourth Proportional to 67,870.62, 101,819.21 and 20,489.58

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Solution

The fourth proportional to 67,870.62, 101,819.21 and 20,489.58 is: 30,738.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,870.62 : 101,819.21 = 20,489.58 : x
  2. Step 2: Convert to fraction form
    67,870.62/101,819.21 = 20,489.58/x
  3. Step 3: Cross multiply
    67,870.62x = 101,819.21 × 20,489.58
  4. Step 4: Simplify right side
    67,870.62x = 2,086,232,746.38
  5. Step 5: Solve for x
    x = 2,086,232,746.38/67,870.62
  6. Step 6: Final answer
    x = 30,738.38

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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.