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Finding the Fourth Proportional to 245,682.96, 339,039.72 and 138,253.20

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Solution

The fourth proportional to 245,682.96, 339,039.72 and 138,253.20 is: 190,787.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,682.96 : 339,039.72 = 138,253.20 : x
  2. Step 2: Convert to fraction form
    245,682.96/339,039.72 = 138,253.20/x
  3. Step 3: Cross multiply
    245,682.96x = 339,039.72 × 138,253.20
  4. Step 4: Simplify right side
    245,682.96x = 46,873,326,217.10
  5. Step 5: Solve for x
    x = 46,873,326,217.10/245,682.96
  6. Step 6: Final answer
    x = 190,787.86

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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.