Home / 128,110.56-191,324.76-109,188.96

Finding the Fourth Proportional to 128,110.56, 191,324.76 and 109,188.96

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Solution

The fourth proportional to 128,110.56, 191,324.76 and 109,188.96 is: 163,066.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,110.56 : 191,324.76 = 109,188.96 : x
  2. Step 2: Convert to fraction form
    128,110.56/191,324.76 = 109,188.96/x
  3. Step 3: Cross multiply
    128,110.56x = 191,324.76 × 109,188.96
  4. Step 4: Simplify right side
    128,110.56x = 20,890,551,566.65
  5. Step 5: Solve for x
    x = 20,890,551,566.65/128,110.56
  6. Step 6: Final answer
    x = 163,066.59

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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.