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Finding the Fourth Proportional to 191,517.54, 287,407.53 and 66,858.54

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Solution

The fourth proportional to 191,517.54, 287,407.53 and 66,858.54 is: 100,333.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,517.54 : 287,407.53 = 66,858.54 : x
  2. Step 2: Convert to fraction form
    191,517.54/287,407.53 = 66,858.54/x
  3. Step 3: Cross multiply
    191,517.54x = 287,407.53 × 66,858.54
  4. Step 4: Simplify right side
    191,517.54x = 19,215,647,840.81
  5. Step 5: Solve for x
    x = 19,215,647,840.81/191,517.54
  6. Step 6: Final answer
    x = 100,333.62

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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.