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Finding the Fourth Proportional to 111,917.70, 167,876.55 and 89,774.33

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Solution

The fourth proportional to 111,917.70, 167,876.55 and 89,774.33 is: 134,661.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,917.70 : 167,876.55 = 89,774.33 : x
  2. Step 2: Convert to fraction form
    111,917.70/167,876.55 = 89,774.33/x
  3. Step 3: Cross multiply
    111,917.70x = 167,876.55 × 89,774.33
  4. Step 4: Simplify right side
    111,917.70x = 15,071,003,959.58
  5. Step 5: Solve for x
    x = 15,071,003,959.58/111,917.70
  6. Step 6: Final answer
    x = 134,661.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.