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Finding the Fourth Proportional to 218,907, 302,091.66 and 118,305

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Solution

The fourth proportional to 218,907, 302,091.66 and 118,305 is: 163,260.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,907 : 302,091.66 = 118,305 : x
  2. Step 2: Convert to fraction form
    218,907/302,091.66 = 118,305/x
  3. Step 3: Cross multiply
    218,907x = 302,091.66 × 118,305
  4. Step 4: Simplify right side
    218,907x = 35,738,953,836.30
  5. Step 5: Solve for x
    x = 35,738,953,836.30/218,907
  6. Step 6: Final answer
    x = 163,260.90

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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.