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Finding the Fourth Proportional to 118,969.92, 178,173.44 and 103,302.40

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Solution

The fourth proportional to 118,969.92, 178,173.44 and 103,302.40 is: 154,709.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,969.92 : 178,173.44 = 103,302.40 : x
  2. Step 2: Convert to fraction form
    118,969.92/178,173.44 = 103,302.40/x
  3. Step 3: Cross multiply
    118,969.92x = 178,173.44 × 103,302.40
  4. Step 4: Simplify right side
    118,969.92x = 18,405,743,968.26
  5. Step 5: Solve for x
    x = 18,405,743,968.26/118,969.92
  6. Step 6: Final answer
    x = 154,709.22

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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.