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Finding the Fourth Proportional to 121,056, 167,057.28 and 68,064

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Solution

The fourth proportional to 121,056, 167,057.28 and 68,064 is: 93,928.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,056 : 167,057.28 = 68,064 : x
  2. Step 2: Convert to fraction form
    121,056/167,057.28 = 68,064/x
  3. Step 3: Cross multiply
    121,056x = 167,057.28 × 68,064
  4. Step 4: Simplify right side
    121,056x = 11,370,586,705.92
  5. Step 5: Solve for x
    x = 11,370,586,705.92/121,056
  6. Step 6: Final answer
    x = 93,928.32

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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.