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Finding the Fourth Proportional to 245,888.20, 339,343.86 and 138,469.96

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Solution

The fourth proportional to 245,888.20, 339,343.86 and 138,469.96 is: 191,098.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,888.20 : 339,343.86 = 138,469.96 : x
  2. Step 2: Convert to fraction form
    245,888.20/339,343.86 = 138,469.96/x
  3. Step 3: Cross multiply
    245,888.20x = 339,343.86 × 138,469.96
  4. Step 4: Simplify right side
    245,888.20x = 46,988,930,720.45
  5. Step 5: Solve for x
    x = 46,988,930,720.45/245,888.20
  6. Step 6: Final answer
    x = 191,098.76

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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.