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Finding the Fourth Proportional to 266,279.10, 399,645.45 and 108,620.70

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Solution

The fourth proportional to 266,279.10, 399,645.45 and 108,620.70 is: 163,023.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,279.10 : 399,645.45 = 108,620.70 : x
  2. Step 2: Convert to fraction form
    266,279.10/399,645.45 = 108,620.70/x
  3. Step 3: Cross multiply
    266,279.10x = 399,645.45 × 108,620.70
  4. Step 4: Simplify right side
    266,279.10x = 43,409,768,530.82
  5. Step 5: Solve for x
    x = 43,409,768,530.82/266,279.10
  6. Step 6: Final answer
    x = 163,023.57

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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.