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Finding the Fourth Proportional to 56,319.78, 84,493.80 and 16,876.80

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Solution

The fourth proportional to 56,319.78, 84,493.80 and 16,876.80 is: 25,319.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,319.78 : 84,493.80 = 16,876.80 : x
  2. Step 2: Convert to fraction form
    56,319.78/84,493.80 = 16,876.80/x
  3. Step 3: Cross multiply
    56,319.78x = 84,493.80 × 16,876.80
  4. Step 4: Simplify right side
    56,319.78x = 1,425,984,963.84
  5. Step 5: Solve for x
    x = 1,425,984,963.84/56,319.78
  6. Step 6: Final answer
    x = 25,319.43

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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.