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Finding the Fourth Proportional to 121,008.17, 166,978.49 and 67,284.52

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Solution

The fourth proportional to 121,008.17, 166,978.49 and 67,284.52 is: 92,845.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,008.17 : 166,978.49 = 67,284.52 : x
  2. Step 2: Convert to fraction form
    121,008.17/166,978.49 = 67,284.52/x
  3. Step 3: Cross multiply
    121,008.17x = 166,978.49 × 67,284.52
  4. Step 4: Simplify right side
    121,008.17x = 11,235,067,549.97
  5. Step 5: Solve for x
    x = 11,235,067,549.97/121,008.17
  6. Step 6: Final answer
    x = 92,845.53

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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.