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Finding the Fourth Proportional to 245,609.70, 338,917.26 and 138,177.42

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Solution

The fourth proportional to 245,609.70, 338,917.26 and 138,177.42 is: 190,671.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,609.70 : 338,917.26 = 138,177.42 : x
  2. Step 2: Convert to fraction form
    245,609.70/338,917.26 = 138,177.42/x
  3. Step 3: Cross multiply
    245,609.70x = 338,917.26 × 138,177.42
  4. Step 4: Simplify right side
    245,609.70x = 46,830,712,580.27
  5. Step 5: Solve for x
    x = 46,830,712,580.27/245,609.70
  6. Step 6: Final answer
    x = 190,671.27

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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.