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Finding the Fourth Proportional to 207,620.70, 311,431.05 and 166,148.70

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Solution

The fourth proportional to 207,620.70, 311,431.05 and 166,148.70 is: 249,223.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,620.70 : 311,431.05 = 166,148.70 : x
  2. Step 2: Convert to fraction form
    207,620.70/311,431.05 = 166,148.70/x
  3. Step 3: Cross multiply
    207,620.70x = 311,431.05 × 166,148.70
  4. Step 4: Simplify right side
    207,620.70x = 51,743,864,097.14
  5. Step 5: Solve for x
    x = 51,743,864,097.14/207,620.70
  6. Step 6: Final answer
    x = 249,223.05

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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.