Home / 80,911.89-121,367.71-21,747.52

Finding the Fourth Proportional to 80,911.89, 121,367.71 and 21,747.52

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Solution

The fourth proportional to 80,911.89, 121,367.71 and 21,747.52 is: 32,621.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,911.89 : 121,367.71 = 21,747.52 : x
  2. Step 2: Convert to fraction form
    80,911.89/121,367.71 = 21,747.52/x
  3. Step 3: Cross multiply
    80,911.89x = 121,367.71 × 21,747.52
  4. Step 4: Simplify right side
    80,911.89x = 2,639,446,700.58
  5. Step 5: Solve for x
    x = 2,639,446,700.58/80,911.89
  6. Step 6: Final answer
    x = 32,621.25

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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.