Home / 80,947.10-121,409.71-21,786.32

Finding the Fourth Proportional to 80,947.10, 121,409.71 and 21,786.32

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Solution

The fourth proportional to 80,947.10, 121,409.71 and 21,786.32 is: 32,676.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,947.10 : 121,409.71 = 21,786.32 : x
  2. Step 2: Convert to fraction form
    80,947.10/121,409.71 = 21,786.32/x
  3. Step 3: Cross multiply
    80,947.10x = 121,409.71 × 21,786.32
  4. Step 4: Simplify right side
    80,947.10x = 2,645,070,420.57
  5. Step 5: Solve for x
    x = 2,645,070,420.57/80,947.10
  6. Step 6: Final answer
    x = 32,676.53

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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.