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Finding the Fourth Proportional to 245,687.68, 339,047.89 and 138,259.52

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Solution

The fourth proportional to 245,687.68, 339,047.89 and 138,259.52 is: 190,797.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,687.68 : 339,047.89 = 138,259.52 : x
  2. Step 2: Convert to fraction form
    245,687.68/339,047.89 = 138,259.52/x
  3. Step 3: Cross multiply
    245,687.68x = 339,047.89 × 138,259.52
  4. Step 4: Simplify right side
    245,687.68x = 46,876,596,487.52
  5. Step 5: Solve for x
    x = 46,876,596,487.52/245,687.68
  6. Step 6: Final answer
    x = 190,797.51

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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.