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Finding the Fourth Proportional to 191,905.65, 287,858.48 and 67,230.45

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Solution

The fourth proportional to 191,905.65, 287,858.48 and 67,230.45 is: 100,845.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,905.65 : 287,858.48 = 67,230.45 : x
  2. Step 2: Convert to fraction form
    191,905.65/287,858.48 = 67,230.45/x
  3. Step 3: Cross multiply
    191,905.65x = 287,858.48 × 67,230.45
  4. Step 4: Simplify right side
    191,905.65x = 19,352,854,810.56
  5. Step 5: Solve for x
    x = 19,352,854,810.56/191,905.65
  6. Step 6: Final answer
    x = 100,845.68

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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.