Home / 80,787.35-121,236.38-28,196.84

Finding the Fourth Proportional to 80,787.35, 121,236.38 and 28,196.84

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Solution

The fourth proportional to 80,787.35, 121,236.38 and 28,196.84 is: 42,314.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,787.35 : 121,236.38 = 28,196.84 : x
  2. Step 2: Convert to fraction form
    80,787.35/121,236.38 = 28,196.84/x
  3. Step 3: Cross multiply
    80,787.35x = 121,236.38 × 28,196.84
  4. Step 4: Simplify right side
    80,787.35x = 3,418,482,061.87
  5. Step 5: Solve for x
    x = 3,418,482,061.87/80,787.35
  6. Step 6: Final answer
    x = 42,314.57

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1.5x scale

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.