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Finding the Fourth Proportional to 70,178.92, 96,911.60 and 45,072.16

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Solution

The fourth proportional to 70,178.92, 96,911.60 and 45,072.16 is: 62,241.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,178.92 : 96,911.60 = 45,072.16 : x
  2. Step 2: Convert to fraction form
    70,178.92/96,911.60 = 45,072.16/x
  3. Step 3: Cross multiply
    70,178.92x = 96,911.60 × 45,072.16
  4. Step 4: Simplify right side
    70,178.92x = 4,368,015,141.06
  5. Step 5: Solve for x
    x = 4,368,015,141.06/70,178.92
  6. Step 6: Final answer
    x = 62,241.13

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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.