Home / 80,720.94-121,063.64-30,783.53

Finding the Fourth Proportional to 80,720.94, 121,063.64 and 30,783.53

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Solution

The fourth proportional to 80,720.94, 121,063.64 and 30,783.53 is: 46,168.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,720.94 : 121,063.64 = 30,783.53 : x
  2. Step 2: Convert to fraction form
    80,720.94/121,063.64 = 30,783.53/x
  3. Step 3: Cross multiply
    80,720.94x = 121,063.64 × 30,783.53
  4. Step 4: Simplify right side
    80,720.94x = 3,726,765,434.61
  5. Step 5: Solve for x
    x = 3,726,765,434.61/80,720.94
  6. Step 6: Final answer
    x = 46,168.51

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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.