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Finding the Fourth Proportional to 207,736.40, 311,561.40 and 89,411.60

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Solution

The fourth proportional to 207,736.40, 311,561.40 and 89,411.60 is: 134,098.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,736.40 : 311,561.40 = 89,411.60 : x
  2. Step 2: Convert to fraction form
    207,736.40/311,561.40 = 89,411.60/x
  3. Step 3: Cross multiply
    207,736.40x = 311,561.40 × 89,411.60
  4. Step 4: Simplify right side
    207,736.40x = 27,857,203,272.24
  5. Step 5: Solve for x
    x = 27,857,203,272.24/207,736.40
  6. Step 6: Final answer
    x = 134,098.81

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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.