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Finding the Fourth Proportional to 236,679.64, 355,009.74 and 131,431.48

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Solution

The fourth proportional to 236,679.64, 355,009.74 and 131,431.48 is: 197,141.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,679.64 : 355,009.74 = 131,431.48 : x
  2. Step 2: Convert to fraction form
    236,679.64/355,009.74 = 131,431.48/x
  3. Step 3: Cross multiply
    236,679.64x = 355,009.74 × 131,431.48
  4. Step 4: Simplify right side
    236,679.64x = 46,659,455,542.62
  5. Step 5: Solve for x
    x = 46,659,455,542.62/236,679.64
  6. Step 6: Final answer
    x = 197,141.82

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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.