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Finding the Fourth Proportional to 121,188, 167,240.16 and 68,196

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Solution

The fourth proportional to 121,188, 167,240.16 and 68,196 is: 94,110.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,188 : 167,240.16 = 68,196 : x
  2. Step 2: Convert to fraction form
    121,188/167,240.16 = 68,196/x
  3. Step 3: Cross multiply
    121,188x = 167,240.16 × 68,196
  4. Step 4: Simplify right side
    121,188x = 11,405,109,951.36
  5. Step 5: Solve for x
    x = 11,405,109,951.36/121,188
  6. Step 6: Final answer
    x = 94,110.89

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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.