Home / 80,579.21-111,233.40-54,390.87

Finding the Fourth Proportional to 80,579.21, 111,233.40 and 54,390.87

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Solution

The fourth proportional to 80,579.21, 111,233.40 and 54,390.87 is: 75,082.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,579.21 : 111,233.40 = 54,390.87 : x
  2. Step 2: Convert to fraction form
    80,579.21/111,233.40 = 54,390.87/x
  3. Step 3: Cross multiply
    80,579.21x = 111,233.40 × 54,390.87
  4. Step 4: Simplify right side
    80,579.21x = 6,050,081,195.09
  5. Step 5: Solve for x
    x = 6,050,081,195.09/80,579.21
  6. Step 6: Final answer
    x = 75,082.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.