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Finding the Fourth Proportional to 223,161.64, 307,961.82 and 121,186.12

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Solution

The fourth proportional to 223,161.64, 307,961.82 and 121,186.12 is: 167,236.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,161.64 : 307,961.82 = 121,186.12 : x
  2. Step 2: Convert to fraction form
    223,161.64/307,961.82 = 121,186.12/x
  3. Step 3: Cross multiply
    223,161.64x = 307,961.82 × 121,186.12
  4. Step 4: Simplify right side
    223,161.64x = 37,320,698,073.94
  5. Step 5: Solve for x
    x = 37,320,698,073.94/223,161.64
  6. Step 6: Final answer
    x = 167,236.17

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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.