Home / 80,757.36-121,126.32-21,591.72

Finding the Fourth Proportional to 80,757.36, 121,126.32 and 21,591.72

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Solution

The fourth proportional to 80,757.36, 121,126.32 and 21,591.72 is: 32,384.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,757.36 : 121,126.32 = 21,591.72 : x
  2. Step 2: Convert to fraction form
    80,757.36/121,126.32 = 21,591.72/x
  3. Step 3: Cross multiply
    80,757.36x = 121,126.32 × 21,591.72
  4. Step 4: Simplify right side
    80,757.36x = 2,615,325,586.07
  5. Step 5: Solve for x
    x = 2,615,325,586.07/80,757.36
  6. Step 6: Final answer
    x = 32,384.98

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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.