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Finding the Fourth Proportional to 121,021, 167,008.98 and 68,029

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Solution

The fourth proportional to 121,021, 167,008.98 and 68,029 is: 93,880.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,021 : 167,008.98 = 68,029 : x
  2. Step 2: Convert to fraction form
    121,021/167,008.98 = 68,029/x
  3. Step 3: Cross multiply
    121,021x = 167,008.98 × 68,029
  4. Step 4: Simplify right side
    121,021x = 11,361,453,900.42
  5. Step 5: Solve for x
    x = 11,361,453,900.42/121,021
  6. Step 6: Final answer
    x = 93,880.02

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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.