Home / 81,031.62-121,601.79-28,441.26

Finding the Fourth Proportional to 81,031.62, 121,601.79 and 28,441.26

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Solution

The fourth proportional to 81,031.62, 121,601.79 and 28,441.26 is: 42,680.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,031.62 : 121,601.79 = 28,441.26 : x
  2. Step 2: Convert to fraction form
    81,031.62/121,601.79 = 28,441.26/x
  3. Step 3: Cross multiply
    81,031.62x = 121,601.79 × 28,441.26
  4. Step 4: Simplify right side
    81,031.62x = 3,458,508,125.86
  5. Step 5: Solve for x
    x = 3,458,508,125.86/81,031.62
  6. Step 6: Final answer
    x = 42,680.97

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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.