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Finding the Fourth Proportional to 101,173.77, 139,540.86 and 64,878.66

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Solution

The fourth proportional to 101,173.77, 139,540.86 and 64,878.66 is: 89,481.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,173.77 : 139,540.86 = 64,878.66 : x
  2. Step 2: Convert to fraction form
    101,173.77/139,540.86 = 64,878.66/x
  3. Step 3: Cross multiply
    101,173.77x = 139,540.86 × 64,878.66
  4. Step 4: Simplify right side
    101,173.77x = 9,053,224,012.05
  5. Step 5: Solve for x
    x = 9,053,224,012.05/101,173.77
  6. Step 6: Final answer
    x = 89,481.93

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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.