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Finding the Fourth Proportional to 139,986.79, 193,182.69 and 76,325.65

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Solution

The fourth proportional to 139,986.79, 193,182.69 and 76,325.65 is: 105,329.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,986.79 : 193,182.69 = 76,325.65 : x
  2. Step 2: Convert to fraction form
    139,986.79/193,182.69 = 76,325.65/x
  3. Step 3: Cross multiply
    139,986.79x = 193,182.69 × 76,325.65
  4. Step 4: Simplify right side
    139,986.79x = 14,744,794,383.00
  5. Step 5: Solve for x
    x = 14,744,794,383.00/139,986.79
  6. Step 6: Final answer
    x = 105,329.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.