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Finding the Fourth Proportional to 245,804.52, 339,216.69 and 138,378.48

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Solution

The fourth proportional to 245,804.52, 339,216.69 and 138,378.48 is: 190,965.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,804.52 : 339,216.69 = 138,378.48 : x
  2. Step 2: Convert to fraction form
    245,804.52/339,216.69 = 138,378.48/x
  3. Step 3: Cross multiply
    245,804.52x = 339,216.69 × 138,378.48
  4. Step 4: Simplify right side
    245,804.52x = 46,940,289,952.83
  5. Step 5: Solve for x
    x = 46,940,289,952.83/245,804.52
  6. Step 6: Final answer
    x = 190,965.93

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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.