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Finding the Fourth Proportional to 138,786.74, 191,529.22 and 85,101.34

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Solution

The fourth proportional to 138,786.74, 191,529.22 and 85,101.34 is: 117,442.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,786.74 : 191,529.22 = 85,101.34 : x
  2. Step 2: Convert to fraction form
    138,786.74/191,529.22 = 85,101.34/x
  3. Step 3: Cross multiply
    138,786.74x = 191,529.22 × 85,101.34
  4. Step 4: Simplify right side
    138,786.74x = 16,299,393,271.15
  5. Step 5: Solve for x
    x = 16,299,393,271.15/138,786.74
  6. Step 6: Final answer
    x = 117,442.01

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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.