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Finding the Fourth Proportional to 191,678.25, 264,517.79 and 105,640.39

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Solution

The fourth proportional to 191,678.25, 264,517.79 and 105,640.39 is: 145,784.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,678.25 : 264,517.79 = 105,640.39 : x
  2. Step 2: Convert to fraction form
    191,678.25/264,517.79 = 105,640.39/x
  3. Step 3: Cross multiply
    191,678.25x = 264,517.79 × 105,640.39
  4. Step 4: Simplify right side
    191,678.25x = 27,943,762,299.98
  5. Step 5: Solve for x
    x = 27,943,762,299.98/191,678.25
  6. Step 6: Final answer
    x = 145,784.73

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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.