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Finding the Fourth Proportional to 139,609.27, 209,411.20 and 39,770.11

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Solution

The fourth proportional to 139,609.27, 209,411.20 and 39,770.11 is: 59,654.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,609.27 : 209,411.20 = 39,770.11 : x
  2. Step 2: Convert to fraction form
    139,609.27/209,411.20 = 39,770.11/x
  3. Step 3: Cross multiply
    139,609.27x = 209,411.20 × 39,770.11
  4. Step 4: Simplify right side
    139,609.27x = 8,328,306,459.23
  5. Step 5: Solve for x
    x = 8,328,306,459.23/139,609.27
  6. Step 6: Final answer
    x = 59,654.39

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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.