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Finding the Fourth Proportional to 53,808.64, 80,725.90 and 16,872.64

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Solution

The fourth proportional to 53,808.64, 80,725.90 and 16,872.64 is: 25,313.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,808.64 : 80,725.90 = 16,872.64 : x
  2. Step 2: Convert to fraction form
    53,808.64/80,725.90 = 16,872.64/x
  3. Step 3: Cross multiply
    53,808.64x = 80,725.90 × 16,872.64
  4. Step 4: Simplify right side
    53,808.64x = 1,362,059,049.38
  5. Step 5: Solve for x
    x = 1,362,059,049.38/53,808.64
  6. Step 6: Final answer
    x = 25,313.02

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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.