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Finding the Fourth Proportional to 245,388.15, 338,638.86 and 137,951.91

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Solution

The fourth proportional to 245,388.15, 338,638.86 and 137,951.91 is: 190,375.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,388.15 : 338,638.86 = 137,951.91 : x
  2. Step 2: Convert to fraction form
    245,388.15/338,638.86 = 137,951.91/x
  3. Step 3: Cross multiply
    245,388.15x = 338,638.86 × 137,951.91
  4. Step 4: Simplify right side
    245,388.15x = 46,715,877,537.22
  5. Step 5: Solve for x
    x = 46,715,877,537.22/245,388.15
  6. Step 6: Final answer
    x = 190,375.44

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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.