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Finding the Fourth Proportional to 212,668.71, 318,702.15 and 117,940.56

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Solution

The fourth proportional to 212,668.71, 318,702.15 and 117,940.56 is: 176,743.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,668.71 : 318,702.15 = 117,940.56 : x
  2. Step 2: Convert to fraction form
    212,668.71/318,702.15 = 117,940.56/x
  3. Step 3: Cross multiply
    212,668.71x = 318,702.15 × 117,940.56
  4. Step 4: Simplify right side
    212,668.71x = 37,587,910,044.20
  5. Step 5: Solve for x
    x = 37,587,910,044.20/212,668.71
  6. Step 6: Final answer
    x = 176,743.96

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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.