Home / 80,851.05-121,270.91-30,240.45

Finding the Fourth Proportional to 80,851.05, 121,270.91 and 30,240.45

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Solution

The fourth proportional to 80,851.05, 121,270.91 and 30,240.45 is: 45,358.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,851.05 : 121,270.91 = 30,240.45 : x
  2. Step 2: Convert to fraction form
    80,851.05/121,270.91 = 30,240.45/x
  3. Step 3: Cross multiply
    80,851.05x = 121,270.91 × 30,240.45
  4. Step 4: Simplify right side
    80,851.05x = 3,667,286,739.11
  5. Step 5: Solve for x
    x = 3,667,286,739.11/80,851.05
  6. Step 6: Final answer
    x = 45,358.55

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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.