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Finding the Fourth Proportional to 121,656.66, 167,874.18 and 67,940.51

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Solution

The fourth proportional to 121,656.66, 167,874.18 and 67,940.51 is: 93,751.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,656.66 : 167,874.18 = 67,940.51 : x
  2. Step 2: Convert to fraction form
    121,656.66/167,874.18 = 67,940.51/x
  3. Step 3: Cross multiply
    121,656.66x = 167,874.18 × 67,940.51
  4. Step 4: Simplify right side
    121,656.66x = 11,405,457,405.03
  5. Step 5: Solve for x
    x = 11,405,457,405.03/121,656.66
  6. Step 6: Final answer
    x = 93,751.20

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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.