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Finding the Fourth Proportional to 245,734.70, 339,124.79 and 138,311.69

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Solution

The fourth proportional to 245,734.70, 339,124.79 and 138,311.69 is: 190,876.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,734.70 : 339,124.79 = 138,311.69 : x
  2. Step 2: Convert to fraction form
    245,734.70/339,124.79 = 138,311.69/x
  3. Step 3: Cross multiply
    245,734.70x = 339,124.79 × 138,311.69
  4. Step 4: Simplify right side
    245,734.70x = 46,904,921,475.95
  5. Step 5: Solve for x
    x = 46,904,921,475.95/245,734.70
  6. Step 6: Final answer
    x = 190,876.27

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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.