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Finding the Fourth Proportional to 121,065, 167,069.70 and 68,073

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Solution

The fourth proportional to 121,065, 167,069.70 and 68,073 is: 93,940.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,065 : 167,069.70 = 68,073 : x
  2. Step 2: Convert to fraction form
    121,065/167,069.70 = 68,073/x
  3. Step 3: Cross multiply
    121,065x = 167,069.70 × 68,073
  4. Step 4: Simplify right side
    121,065x = 11,372,935,688.10
  5. Step 5: Solve for x
    x = 11,372,935,688.10/121,065
  6. Step 6: Final answer
    x = 93,940.74

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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.