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Finding the Fourth Proportional to 80,616.64, 120,924.79 and 21,452.32

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Solution

The fourth proportional to 80,616.64, 120,924.79 and 21,452.32 is: 32,178.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,616.64 : 120,924.79 = 21,452.32 : x
  2. Step 2: Convert to fraction form
    80,616.64/120,924.79 = 21,452.32/x
  3. Step 3: Cross multiply
    80,616.64x = 120,924.79 × 21,452.32
  4. Step 4: Simplify right side
    80,616.64x = 2,594,117,291.01
  5. Step 5: Solve for x
    x = 2,594,117,291.01/80,616.64
  6. Step 6: Final answer
    x = 32,178.43

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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.