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Finding the Fourth Proportional to 245,553.48, 338,893.78 and 138,128.04

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Solution

The fourth proportional to 245,553.48, 338,893.78 and 138,128.04 is: 190,633.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,553.48 : 338,893.78 = 138,128.04 : x
  2. Step 2: Convert to fraction form
    245,553.48/338,893.78 = 138,128.04/x
  3. Step 3: Cross multiply
    245,553.48x = 338,893.78 × 138,128.04
  4. Step 4: Simplify right side
    245,553.48x = 46,810,733,599.59
  5. Step 5: Solve for x
    x = 46,810,733,599.59/245,553.48
  6. Step 6: Final answer
    x = 190,633.56

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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.