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Finding the Fourth Proportional to 121,608.16, 167,770.94 and 81,258.01

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Solution

The fourth proportional to 121,608.16, 167,770.94 and 81,258.01 is: 112,103.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,608.16 : 167,770.94 = 81,258.01 : x
  2. Step 2: Convert to fraction form
    121,608.16/167,770.94 = 81,258.01/x
  3. Step 3: Cross multiply
    121,608.16x = 167,770.94 × 81,258.01
  4. Step 4: Simplify right side
    121,608.16x = 13,632,731,894.51
  5. Step 5: Solve for x
    x = 13,632,731,894.51/121,608.16
  6. Step 6: Final answer
    x = 112,103.76

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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.