Home / 80,787.08-121,171.35-21,627.38

Finding the Fourth Proportional to 80,787.08, 121,171.35 and 21,627.38

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Solution

The fourth proportional to 80,787.08, 121,171.35 and 21,627.38 is: 32,438.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,787.08 : 121,171.35 = 21,627.38 : x
  2. Step 2: Convert to fraction form
    80,787.08/121,171.35 = 21,627.38/x
  3. Step 3: Cross multiply
    80,787.08x = 121,171.35 × 21,627.38
  4. Step 4: Simplify right side
    80,787.08x = 2,620,618,831.56
  5. Step 5: Solve for x
    x = 2,620,618,831.56/80,787.08
  6. Step 6: Final answer
    x = 32,438.59

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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.