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Finding the Fourth Proportional to 101,245.75, 139,719.14 and 56,533.75

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Solution

The fourth proportional to 101,245.75, 139,719.14 and 56,533.75 is: 78,016.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,245.75 : 139,719.14 = 56,533.75 : x
  2. Step 2: Convert to fraction form
    101,245.75/139,719.14 = 56,533.75/x
  3. Step 3: Cross multiply
    101,245.75x = 139,719.14 × 56,533.75
  4. Step 4: Simplify right side
    101,245.75x = 7,898,846,930.98
  5. Step 5: Solve for x
    x = 7,898,846,930.98/101,245.75
  6. Step 6: Final answer
    x = 78,016.58

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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.