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Finding the Fourth Proportional to 56,469.80, 84,819.90 and 54,511.40

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Solution

The fourth proportional to 56,469.80, 84,819.90 and 54,511.40 is: 81,878.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,469.80 : 84,819.90 = 54,511.40 : x
  2. Step 2: Convert to fraction form
    56,469.80/84,819.90 = 54,511.40/x
  3. Step 3: Cross multiply
    56,469.80x = 84,819.90 × 54,511.40
  4. Step 4: Simplify right side
    56,469.80x = 4,623,651,496.86
  5. Step 5: Solve for x
    x = 4,623,651,496.86/56,469.80
  6. Step 6: Final answer
    x = 81,878.30

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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.