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Finding the Fourth Proportional to 121,754.66, 168,018.30 and 68,040.11

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Solution

The fourth proportional to 121,754.66, 168,018.30 and 68,040.11 is: 93,893.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,754.66 : 168,018.30 = 68,040.11 : x
  2. Step 2: Convert to fraction form
    121,754.66/168,018.30 = 68,040.11/x
  3. Step 3: Cross multiply
    121,754.66x = 168,018.30 × 68,040.11
  4. Step 4: Simplify right side
    121,754.66x = 11,431,982,773.92
  5. Step 5: Solve for x
    x = 11,431,982,773.92/121,754.66
  6. Step 6: Final answer
    x = 93,893.60

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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.