Home / 128,511.09-191,846.82-111,700.56

Finding the Fourth Proportional to 128,511.09, 191,846.82 and 111,700.56

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Solution

The fourth proportional to 128,511.09, 191,846.82 and 111,700.56 is: 166,751.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,511.09 : 191,846.82 = 111,700.56 : x
  2. Step 2: Convert to fraction form
    128,511.09/191,846.82 = 111,700.56/x
  3. Step 3: Cross multiply
    128,511.09x = 191,846.82 × 111,700.56
  4. Step 4: Simplify right side
    128,511.09x = 21,429,397,228.22
  5. Step 5: Solve for x
    x = 21,429,397,228.22/128,511.09
  6. Step 6: Final answer
    x = 166,751.35

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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.