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Finding the Fourth Proportional to 121,697, 167,941.86 and 68,705

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Solution

The fourth proportional to 121,697, 167,941.86 and 68,705 is: 94,812.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,697 : 167,941.86 = 68,705 : x
  2. Step 2: Convert to fraction form
    121,697/167,941.86 = 68,705/x
  3. Step 3: Cross multiply
    121,697x = 167,941.86 × 68,705
  4. Step 4: Simplify right side
    121,697x = 11,538,445,491.30
  5. Step 5: Solve for x
    x = 11,538,445,491.30/121,697
  6. Step 6: Final answer
    x = 94,812.90

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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.