Home / 128,108.56-191,321.78-109,186.96

Finding the Fourth Proportional to 128,108.56, 191,321.78 and 109,186.96

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Solution

The fourth proportional to 128,108.56, 191,321.78 and 109,186.96 is: 163,063.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,108.56 : 191,321.78 = 109,186.96 : x
  2. Step 2: Convert to fraction form
    128,108.56/191,321.78 = 109,186.96/x
  3. Step 3: Cross multiply
    128,108.56x = 191,321.78 × 109,186.96
  4. Step 4: Simplify right side
    128,108.56x = 20,889,843,539.99
  5. Step 5: Solve for x
    x = 20,889,843,539.99/128,108.56
  6. Step 6: Final answer
    x = 163,063.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.