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Finding the Fourth Proportional to 74,791.44, 103,211.28 and 42,960.60

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Solution

The fourth proportional to 74,791.44, 103,211.28 and 42,960.60 is: 59,285.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,791.44 : 103,211.28 = 42,960.60 : x
  2. Step 2: Convert to fraction form
    74,791.44/103,211.28 = 42,960.60/x
  3. Step 3: Cross multiply
    74,791.44x = 103,211.28 × 42,960.60
  4. Step 4: Simplify right side
    74,791.44x = 4,434,018,515.57
  5. Step 5: Solve for x
    x = 4,434,018,515.57/74,791.44
  6. Step 6: Final answer
    x = 59,285.11

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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.