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Finding the Fourth Proportional to 217,668.58, 326,628.92 and 91,297.58

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Solution

The fourth proportional to 217,668.58, 326,628.92 and 91,297.58 is: 136,999.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,668.58 : 326,628.92 = 91,297.58 : x
  2. Step 2: Convert to fraction form
    217,668.58/326,628.92 = 91,297.58/x
  3. Step 3: Cross multiply
    217,668.58x = 326,628.92 × 91,297.58
  4. Step 4: Simplify right side
    217,668.58x = 29,820,428,549.11
  5. Step 5: Solve for x
    x = 29,820,428,549.11/217,668.58
  6. Step 6: Final answer
    x = 136,999.23

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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.