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Finding the Fourth Proportional to 245,750.90, 339,168.87 and 138,341.86

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Solution

The fourth proportional to 245,750.90, 339,168.87 and 138,341.86 is: 190,930.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,750.90 : 339,168.87 = 138,341.86 : x
  2. Step 2: Convert to fraction form
    245,750.90/339,168.87 = 138,341.86/x
  3. Step 3: Cross multiply
    245,750.90x = 339,168.87 × 138,341.86
  4. Step 4: Simplify right side
    245,750.90x = 46,921,251,481.98
  5. Step 5: Solve for x
    x = 46,921,251,481.98/245,750.90
  6. Step 6: Final answer
    x = 190,930.13

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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.