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Finding the Fourth Proportional to 121,110, 167,131.80 and 68,118

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Solution

The fourth proportional to 121,110, 167,131.80 and 68,118 is: 94,002.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,110 : 167,131.80 = 68,118 : x
  2. Step 2: Convert to fraction form
    121,110/167,131.80 = 68,118/x
  3. Step 3: Cross multiply
    121,110x = 167,131.80 × 68,118
  4. Step 4: Simplify right side
    121,110x = 11,384,683,952.40
  5. Step 5: Solve for x
    x = 11,384,683,952.40/121,110
  6. Step 6: Final answer
    x = 94,002.84

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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.