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Finding the Fourth Proportional to 207,668.74, 311,370.03 and 87,693.20

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Solution

The fourth proportional to 207,668.74, 311,370.03 and 87,693.20 is: 131,483.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,668.74 : 311,370.03 = 87,693.20 : x
  2. Step 2: Convert to fraction form
    207,668.74/311,370.03 = 87,693.20/x
  3. Step 3: Cross multiply
    207,668.74x = 311,370.03 × 87,693.20
  4. Step 4: Simplify right side
    207,668.74x = 27,305,034,314.80
  5. Step 5: Solve for x
    x = 27,305,034,314.80/207,668.74
  6. Step 6: Final answer
    x = 131,483.60

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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.