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Finding the Fourth Proportional to 193,085.79, 289,667.70 and 66,730.65

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Solution

The fourth proportional to 193,085.79, 289,667.70 and 66,730.65 is: 100,109.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,085.79 : 289,667.70 = 66,730.65 : x
  2. Step 2: Convert to fraction form
    193,085.79/289,667.70 = 66,730.65/x
  3. Step 3: Cross multiply
    193,085.79x = 289,667.70 × 66,730.65
  4. Step 4: Simplify right side
    193,085.79x = 19,329,713,905.01
  5. Step 5: Solve for x
    x = 19,329,713,905.01/193,085.79
  6. Step 6: Final answer
    x = 100,109.46

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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.