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Finding the Fourth Proportional to 139,697.07, 209,553.35 and 39,849.58

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Solution

The fourth proportional to 139,697.07, 209,553.35 and 39,849.58 is: 59,776.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,697.07 : 209,553.35 = 39,849.58 : x
  2. Step 2: Convert to fraction form
    139,697.07/209,553.35 = 39,849.58/x
  3. Step 3: Cross multiply
    139,697.07x = 209,553.35 × 39,849.58
  4. Step 4: Simplify right side
    139,697.07x = 8,350,613,047.79
  5. Step 5: Solve for x
    x = 8,350,613,047.79/139,697.07
  6. Step 6: Final answer
    x = 59,776.58

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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.