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Finding the Fourth Proportional to 58,661.26, 80,815.80 and 47,988.70

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Solution

The fourth proportional to 58,661.26, 80,815.80 and 47,988.70 is: 66,112.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,661.26 : 80,815.80 = 47,988.70 : x
  2. Step 2: Convert to fraction form
    58,661.26/80,815.80 = 47,988.70/x
  3. Step 3: Cross multiply
    58,661.26x = 80,815.80 × 47,988.70
  4. Step 4: Simplify right side
    58,661.26x = 3,878,245,181.46
  5. Step 5: Solve for x
    x = 3,878,245,181.46/58,661.26
  6. Step 6: Final answer
    x = 66,112.54

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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.