Home / 80,921.08-121,381.44-28,345.60

Finding the Fourth Proportional to 80,921.08, 121,381.44 and 28,345.60

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Solution

The fourth proportional to 80,921.08, 121,381.44 and 28,345.60 is: 42,518.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,921.08 : 121,381.44 = 28,345.60 : x
  2. Step 2: Convert to fraction form
    80,921.08/121,381.44 = 28,345.60/x
  3. Step 3: Cross multiply
    80,921.08x = 121,381.44 × 28,345.60
  4. Step 4: Simplify right side
    80,921.08x = 3,440,629,745.66
  5. Step 5: Solve for x
    x = 3,440,629,745.66/80,921.08
  6. Step 6: Final answer
    x = 42,518.34

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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.