Home / 81,084.42-121,682-28,493.91

Finding the Fourth Proportional to 81,084.42, 121,682 and 28,493.91

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Solution

The fourth proportional to 81,084.42, 121,682 and 28,493.91 is: 42,760.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,084.42 : 121,682 = 28,493.91 : x
  2. Step 2: Convert to fraction form
    81,084.42/121,682 = 28,493.91/x
  3. Step 3: Cross multiply
    81,084.42x = 121,682 × 28,493.91
  4. Step 4: Simplify right side
    81,084.42x = 3,467,195,956.62
  5. Step 5: Solve for x
    x = 3,467,195,956.62/81,084.42
  6. Step 6: Final answer
    x = 42,760.32

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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.