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Finding the Fourth Proportional to 191,517.04, 287,406.78 and 66,858.04

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Solution

The fourth proportional to 191,517.04, 287,406.78 and 66,858.04 is: 100,332.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,517.04 : 287,406.78 = 66,858.04 : x
  2. Step 2: Convert to fraction form
    191,517.04/287,406.78 = 66,858.04/x
  3. Step 3: Cross multiply
    191,517.04x = 287,406.78 × 66,858.04
  4. Step 4: Simplify right side
    191,517.04x = 19,215,453,993.51
  5. Step 5: Solve for x
    x = 19,215,453,993.51/191,517.04
  6. Step 6: Final answer
    x = 100,332.87

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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.