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Finding the Fourth Proportional to 245,357.28, 338,570.16 and 137,917.92

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Solution

The fourth proportional to 245,357.28, 338,570.16 and 137,917.92 is: 190,313.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,357.28 : 338,570.16 = 137,917.92 : x
  2. Step 2: Convert to fraction form
    245,357.28/338,570.16 = 137,917.92/x
  3. Step 3: Cross multiply
    245,357.28x = 338,570.16 × 137,917.92
  4. Step 4: Simplify right side
    245,357.28x = 46,694,892,241.27
  5. Step 5: Solve for x
    x = 46,694,892,241.27/245,357.28
  6. Step 6: Final answer
    x = 190,313.86

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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.