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Finding the Fourth Proportional to 245,609.55, 338,940.65 and 138,179.66

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Solution

The fourth proportional to 245,609.55, 338,940.65 and 138,179.66 is: 190,687.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,609.55 : 338,940.65 = 138,179.66 : x
  2. Step 2: Convert to fraction form
    245,609.55/338,940.65 = 138,179.66/x
  3. Step 3: Cross multiply
    245,609.55x = 338,940.65 × 138,179.66
  4. Step 4: Simplify right side
    245,609.55x = 46,834,702,427.92
  5. Step 5: Solve for x
    x = 46,834,702,427.92/245,609.55
  6. Step 6: Final answer
    x = 190,687.63

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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.