Home / 80,975.12-121,482-25,571.12

Finding the Fourth Proportional to 80,975.12, 121,482 and 25,571.12

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Solution

The fourth proportional to 80,975.12, 121,482 and 25,571.12 is: 38,362.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,975.12 : 121,482 = 25,571.12 : x
  2. Step 2: Convert to fraction form
    80,975.12/121,482 = 25,571.12/x
  3. Step 3: Cross multiply
    80,975.12x = 121,482 × 25,571.12
  4. Step 4: Simplify right side
    80,975.12x = 3,106,430,799.84
  5. Step 5: Solve for x
    x = 3,106,430,799.84/80,975.12
  6. Step 6: Final answer
    x = 38,362.78

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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.