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Finding the Fourth Proportional to 121,079, 167,089.20 and 68,087

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Solution

The fourth proportional to 121,079, 167,089.20 and 68,087 is: 93,960.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,079 : 167,089.20 = 68,087 : x
  2. Step 2: Convert to fraction form
    121,079/167,089.20 = 68,087/x
  3. Step 3: Cross multiply
    121,079x = 167,089.20 × 68,087
  4. Step 4: Simplify right side
    121,079x = 11,376,602,360.40
  5. Step 5: Solve for x
    x = 11,376,602,360.40/121,079
  6. Step 6: Final answer
    x = 93,960.16

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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.