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Finding the Fourth Proportional to 217,668.04, 300,378.90 and 122,173

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Solution

The fourth proportional to 217,668.04, 300,378.90 and 122,173 is: 168,597.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,668.04 : 300,378.90 = 122,173 : x
  2. Step 2: Convert to fraction form
    217,668.04/300,378.90 = 122,173/x
  3. Step 3: Cross multiply
    217,668.04x = 300,378.90 × 122,173
  4. Step 4: Simplify right side
    217,668.04x = 36,698,191,349.70
  5. Step 5: Solve for x
    x = 36,698,191,349.70/217,668.04
  6. Step 6: Final answer
    x = 168,597.06

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1.5x scale

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.