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Finding the Fourth Proportional to 218,781, 301,917.94 and 118,179

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Solution

The fourth proportional to 218,781, 301,917.94 and 118,179 is: 163,087.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,781 : 301,917.94 = 118,179 : x
  2. Step 2: Convert to fraction form
    218,781/301,917.94 = 118,179/x
  3. Step 3: Cross multiply
    218,781x = 301,917.94 × 118,179
  4. Step 4: Simplify right side
    218,781x = 35,680,360,231.26
  5. Step 5: Solve for x
    x = 35,680,360,231.26/218,781
  6. Step 6: Final answer
    x = 163,087.11

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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.