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Finding the Fourth Proportional to 80,185.49, 120,278.74 and 21,020.64

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Solution

The fourth proportional to 80,185.49, 120,278.74 and 21,020.64 is: 31,531.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,185.49 : 120,278.74 = 21,020.64 : x
  2. Step 2: Convert to fraction form
    80,185.49/120,278.74 = 21,020.64/x
  3. Step 3: Cross multiply
    80,185.49x = 120,278.74 × 21,020.64
  4. Step 4: Simplify right side
    80,185.49x = 2,528,336,093.19
  5. Step 5: Solve for x
    x = 2,528,336,093.19/80,185.49
  6. Step 6: Final answer
    x = 31,531.09

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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.