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Finding the Fourth Proportional to 245,755.44, 339,074.64 and 138,319.20

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Solution

The fourth proportional to 245,755.44, 339,074.64 and 138,319.20 is: 190,842.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,755.44 : 339,074.64 = 138,319.20 : x
  2. Step 2: Convert to fraction form
    245,755.44/339,074.64 = 138,319.20/x
  3. Step 3: Cross multiply
    245,755.44x = 339,074.64 × 138,319.20
  4. Step 4: Simplify right side
    245,755.44x = 46,900,532,945.09
  5. Step 5: Solve for x
    x = 46,900,532,945.09/245,755.44
  6. Step 6: Final answer
    x = 190,842.30

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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.