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Finding the Fourth Proportional to 378,861.10, 568,385.20 and 112,620.48

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Solution

The fourth proportional to 378,861.10, 568,385.20 and 112,620.48 is: 168,958.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,861.10 : 568,385.20 = 112,620.48 : x
  2. Step 2: Convert to fraction form
    378,861.10/568,385.20 = 112,620.48/x
  3. Step 3: Cross multiply
    378,861.10x = 568,385.20 × 112,620.48
  4. Step 4: Simplify right side
    378,861.10x = 64,011,812,058.23
  5. Step 5: Solve for x
    x = 64,011,812,058.23/378,861.10
  6. Step 6: Final answer
    x = 168,958.52

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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.