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Finding the Fourth Proportional to 138,668.58, 208,029.84 and 53,273.22

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Solution

The fourth proportional to 138,668.58, 208,029.84 and 53,273.22 is: 79,920.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,668.58 : 208,029.84 = 53,273.22 : x
  2. Step 2: Convert to fraction form
    138,668.58/208,029.84 = 53,273.22/x
  3. Step 3: Cross multiply
    138,668.58x = 208,029.84 × 53,273.22
  4. Step 4: Simplify right side
    138,668.58x = 11,082,418,392.74
  5. Step 5: Solve for x
    x = 11,082,418,392.74/138,668.58
  6. Step 6: Final answer
    x = 79,920.18

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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.