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Finding the Fourth Proportional to 80,797.32, 121,220.64 and 28,211.28

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Solution

The fourth proportional to 80,797.32, 121,220.64 and 28,211.28 is: 42,325.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,797.32 : 121,220.64 = 28,211.28 : x
  2. Step 2: Convert to fraction form
    80,797.32/121,220.64 = 28,211.28/x
  3. Step 3: Cross multiply
    80,797.32x = 121,220.64 × 28,211.28
  4. Step 4: Simplify right side
    80,797.32x = 3,419,789,416.82
  5. Step 5: Solve for x
    x = 3,419,789,416.82/80,797.32
  6. Step 6: Final answer
    x = 42,325.53

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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.