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Finding the Fourth Proportional to 217,620,668.72, 300,293,691.72 and 123,504,844.40

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Solution

The fourth proportional to 217,620,668.72, 300,293,691.72 and 123,504,844.40 is: 170,423,728.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,620,668.72 : 300,293,691.72 = 123,504,844.40 : x
  2. Step 2: Convert to fraction form
    217,620,668.72/300,293,691.72 = 123,504,844.40/x
  3. Step 3: Cross multiply
    217,620,668.72x = 300,293,691.72 × 123,504,844.40
  4. Step 4: Simplify right side
    217,620,668.72x = 37,087,725,670,180,176
  5. Step 5: Solve for x
    x = 37,087,725,670,180,176/217,620,668.72
  6. Step 6: Final answer
    x = 170,423,728.08

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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.