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Finding the Fourth Proportional to 228,606.47, 315,481.60 and 136,820.64

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Solution

The fourth proportional to 228,606.47, 315,481.60 and 136,820.64 is: 188,815.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,606.47 : 315,481.60 = 136,820.64 : x
  2. Step 2: Convert to fraction form
    228,606.47/315,481.60 = 136,820.64/x
  3. Step 3: Cross multiply
    228,606.47x = 315,481.60 × 136,820.64
  4. Step 4: Simplify right side
    228,606.47x = 43,164,395,774.31
  5. Step 5: Solve for x
    x = 43,164,395,774.31/228,606.47
  6. Step 6: Final answer
    x = 188,815.29

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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.