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Finding the Fourth Proportional to 193,290.21, 289,955.22 and 66,930.21

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Solution

The fourth proportional to 193,290.21, 289,955.22 and 66,930.21 is: 100,402.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,290.21 : 289,955.22 = 66,930.21 : x
  2. Step 2: Convert to fraction form
    193,290.21/289,955.22 = 66,930.21/x
  3. Step 3: Cross multiply
    193,290.21x = 289,955.22 × 66,930.21
  4. Step 4: Simplify right side
    193,290.21x = 19,406,763,514.21
  5. Step 5: Solve for x
    x = 19,406,763,514.21/193,290.21
  6. Step 6: Final answer
    x = 100,402.21

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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.