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Finding the Fourth Proportional to 245,434.63, 338,691.81 and 136,538.43

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Solution

The fourth proportional to 245,434.63, 338,691.81 and 136,538.43 is: 188,418.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,434.63 : 338,691.81 = 136,538.43 : x
  2. Step 2: Convert to fraction form
    245,434.63/338,691.81 = 136,538.43/x
  3. Step 3: Cross multiply
    245,434.63x = 338,691.81 × 136,538.43
  4. Step 4: Simplify right side
    245,434.63x = 46,244,448,938.85
  5. Step 5: Solve for x
    x = 46,244,448,938.85/245,434.63
  6. Step 6: Final answer
    x = 188,418.60

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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.