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Finding the Fourth Proportional to 191,728.40, 287,376.60 and 91,936.40

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Solution

The fourth proportional to 191,728.40, 287,376.60 and 91,936.40 is: 137,801.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,728.40 : 287,376.60 = 91,936.40 : x
  2. Step 2: Convert to fraction form
    191,728.40/287,376.60 = 91,936.40/x
  3. Step 3: Cross multiply
    191,728.40x = 287,376.60 × 91,936.40
  4. Step 4: Simplify right side
    191,728.40x = 26,420,370,048.24
  5. Step 5: Solve for x
    x = 26,420,370,048.24/191,728.40
  6. Step 6: Final answer
    x = 137,801.03

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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.