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Finding the Fourth Proportional to 207,765.60, 311,664.60 and 89,440.80

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Solution

The fourth proportional to 207,765.60, 311,664.60 and 89,440.80 is: 134,168.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,765.60 : 311,664.60 = 89,440.80 : x
  2. Step 2: Convert to fraction form
    207,765.60/311,664.60 = 89,440.80/x
  3. Step 3: Cross multiply
    207,765.60x = 311,664.60 × 89,440.80
  4. Step 4: Simplify right side
    207,765.60x = 27,875,531,155.68
  5. Step 5: Solve for x
    x = 27,875,531,155.68/207,765.60
  6. Step 6: Final answer
    x = 134,168.17

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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.