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Finding the Fourth Proportional to 191,768.40, 264,702.60 and 128,120.40

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Solution

The fourth proportional to 191,768.40, 264,702.60 and 128,120.40 is: 176,847.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,768.40 : 264,702.60 = 128,120.40 : x
  2. Step 2: Convert to fraction form
    191,768.40/264,702.60 = 128,120.40/x
  3. Step 3: Cross multiply
    191,768.40x = 264,702.60 × 128,120.40
  4. Step 4: Simplify right side
    191,768.40x = 33,913,802,993.04
  5. Step 5: Solve for x
    x = 33,913,802,993.04/191,768.40
  6. Step 6: Final answer
    x = 176,847.71

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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.