Home / 80,757.81-121,129.29-21,591.36

Finding the Fourth Proportional to 80,757.81, 121,129.29 and 21,591.36

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Solution

The fourth proportional to 80,757.81, 121,129.29 and 21,591.36 is: 32,385.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,757.81 : 121,129.29 = 21,591.36 : x
  2. Step 2: Convert to fraction form
    80,757.81/121,129.29 = 21,591.36/x
  3. Step 3: Cross multiply
    80,757.81x = 121,129.29 × 21,591.36
  4. Step 4: Simplify right side
    80,757.81x = 2,615,346,106.93
  5. Step 5: Solve for x
    x = 2,615,346,106.93/80,757.81
  6. Step 6: Final answer
    x = 32,385.05

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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.