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Finding the Fourth Proportional to 423,788.72, 635,682.48 and 108,245.72

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Solution

The fourth proportional to 423,788.72, 635,682.48 and 108,245.72 is: 162,368.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,788.72 : 635,682.48 = 108,245.72 : x
  2. Step 2: Convert to fraction form
    423,788.72/635,682.48 = 108,245.72/x
  3. Step 3: Cross multiply
    423,788.72x = 635,682.48 × 108,245.72
  4. Step 4: Simplify right side
    423,788.72x = 68,809,907,738.99
  5. Step 5: Solve for x
    x = 68,809,907,738.99/423,788.72
  6. Step 6: Final answer
    x = 162,368.43

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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.