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Finding the Fourth Proportional to 57,872.48, 79,864.40 and 33,687.84

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Solution

The fourth proportional to 57,872.48, 79,864.40 and 33,687.84 is: 46,489.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,872.48 : 79,864.40 = 33,687.84 : x
  2. Step 2: Convert to fraction form
    57,872.48/79,864.40 = 33,687.84/x
  3. Step 3: Cross multiply
    57,872.48x = 79,864.40 × 33,687.84
  4. Step 4: Simplify right side
    57,872.48x = 2,690,459,128.90
  5. Step 5: Solve for x
    x = 2,690,459,128.90/57,872.48
  6. Step 6: Final answer
    x = 46,489.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.