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Finding the Fourth Proportional to 121,692, 167,934.96 and 68,700

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Solution

The fourth proportional to 121,692, 167,934.96 and 68,700 is: 94,806

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,692 : 167,934.96 = 68,700 : x
  2. Step 2: Convert to fraction form
    121,692/167,934.96 = 68,700/x
  3. Step 3: Cross multiply
    121,692x = 167,934.96 × 68,700
  4. Step 4: Simplify right side
    121,692x = 11,537,131,752
  5. Step 5: Solve for x
    x = 11,537,131,752/121,692
  6. Step 6: Final answer
    x = 94,806

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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.