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Finding the Fourth Proportional to 121,111, 167,133.18 and 68,119

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Solution

The fourth proportional to 121,111, 167,133.18 and 68,119 is: 94,004.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,111 : 167,133.18 = 68,119 : x
  2. Step 2: Convert to fraction form
    121,111/167,133.18 = 68,119/x
  3. Step 3: Cross multiply
    121,111x = 167,133.18 × 68,119
  4. Step 4: Simplify right side
    121,111x = 11,384,945,088.42
  5. Step 5: Solve for x
    x = 11,384,945,088.42/121,111
  6. Step 6: Final answer
    x = 94,004.22

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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.