Home / 80,915.39-121,346.85-30,992.83

Finding the Fourth Proportional to 80,915.39, 121,346.85 and 30,992.83

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Solution

The fourth proportional to 80,915.39, 121,346.85 and 30,992.83 is: 46,479.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,915.39 : 121,346.85 = 30,992.83 : x
  2. Step 2: Convert to fraction form
    80,915.39/121,346.85 = 30,992.83/x
  3. Step 3: Cross multiply
    80,915.39x = 121,346.85 × 30,992.83
  4. Step 4: Simplify right side
    80,915.39x = 3,760,882,138.12
  5. Step 5: Solve for x
    x = 3,760,882,138.12/80,915.39
  6. Step 6: Final answer
    x = 46,479.19

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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.