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Finding the Fourth Proportional to 368,640.03, 553,093.18 and 128,789.34

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Solution

The fourth proportional to 368,640.03, 553,093.18 and 128,789.34 is: 193,230.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,640.03 : 553,093.18 = 128,789.34 : x
  2. Step 2: Convert to fraction form
    368,640.03/553,093.18 = 128,789.34/x
  3. Step 3: Cross multiply
    368,640.03x = 553,093.18 × 128,789.34
  4. Step 4: Simplify right side
    368,640.03x = 71,232,505,610.70
  5. Step 5: Solve for x
    x = 71,232,505,610.70/368,640.03
  6. Step 6: Final answer
    x = 193,230.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.