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Finding the Fourth Proportional to 245,898.44, 339,336.50 and 138,469.76

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Solution

The fourth proportional to 245,898.44, 339,336.50 and 138,469.76 is: 191,086.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,898.44 : 339,336.50 = 138,469.76 : x
  2. Step 2: Convert to fraction form
    245,898.44/339,336.50 = 138,469.76/x
  3. Step 3: Cross multiply
    245,898.44x = 339,336.50 × 138,469.76
  4. Step 4: Simplify right side
    245,898.44x = 46,987,843,714.24
  5. Step 5: Solve for x
    x = 46,987,843,714.24/245,898.44
  6. Step 6: Final answer
    x = 191,086.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.