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Finding the Fourth Proportional to 207,663.40, 311,379.90 and 89,314.60

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Solution

The fourth proportional to 207,663.40, 311,379.90 and 89,314.60 is: 133,922.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,663.40 : 311,379.90 = 89,314.60 : x
  2. Step 2: Convert to fraction form
    207,663.40/311,379.90 = 89,314.60/x
  3. Step 3: Cross multiply
    207,663.40x = 311,379.90 × 89,314.60
  4. Step 4: Simplify right side
    207,663.40x = 27,810,771,216.54
  5. Step 5: Solve for x
    x = 27,810,771,216.54/207,663.40
  6. Step 6: Final answer
    x = 133,922.35

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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.