Home / 80,728.40-111,408.36-48,879.28

Finding the Fourth Proportional to 80,728.40, 111,408.36 and 48,879.28

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Solution

The fourth proportional to 80,728.40, 111,408.36 and 48,879.28 is: 67,455.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,728.40 : 111,408.36 = 48,879.28 : x
  2. Step 2: Convert to fraction form
    80,728.40/111,408.36 = 48,879.28/x
  3. Step 3: Cross multiply
    80,728.40x = 111,408.36 × 48,879.28
  4. Step 4: Simplify right side
    80,728.40x = 5,445,560,422.78
  5. Step 5: Solve for x
    x = 5,445,560,422.78/80,728.40
  6. Step 6: Final answer
    x = 67,455.32

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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.