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Finding the Fourth Proportional to 207,780.60, 311,687.10 and 89,455.80

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Solution

The fourth proportional to 207,780.60, 311,687.10 and 89,455.80 is: 134,190.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,780.60 : 311,687.10 = 89,455.80 : x
  2. Step 2: Convert to fraction form
    207,780.60/311,687.10 = 89,455.80/x
  3. Step 3: Cross multiply
    207,780.60x = 311,687.10 × 89,455.80
  4. Step 4: Simplify right side
    207,780.60x = 27,882,218,880.18
  5. Step 5: Solve for x
    x = 27,882,218,880.18/207,780.60
  6. Step 6: Final answer
    x = 134,190.67

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1.5x scale

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.