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Finding the Fourth Proportional to 245,542.64, 338,845.38 and 138,112.64

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Solution

The fourth proportional to 245,542.64, 338,845.38 and 138,112.64 is: 190,593.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,542.64 : 338,845.38 = 138,112.64 : x
  2. Step 2: Convert to fraction form
    245,542.64/338,845.38 = 138,112.64/x
  3. Step 3: Cross multiply
    245,542.64x = 338,845.38 × 138,112.64
  4. Step 4: Simplify right side
    245,542.64x = 46,798,829,983.60
  5. Step 5: Solve for x
    x = 46,798,829,983.60/245,542.64
  6. Step 6: Final answer
    x = 190,593.50

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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.