Home / 211,170.69-291,415.60-115,680.78

Finding the Fourth Proportional to 211,170.69, 291,415.60 and 115,680.78

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Solution

The fourth proportional to 211,170.69, 291,415.60 and 115,680.78 is: 159,639.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,170.69 : 291,415.60 = 115,680.78 : x
  2. Step 2: Convert to fraction form
    211,170.69/291,415.60 = 115,680.78/x
  3. Step 3: Cross multiply
    211,170.69x = 291,415.60 × 115,680.78
  4. Step 4: Simplify right side
    211,170.69x = 33,711,183,912.17
  5. Step 5: Solve for x
    x = 33,711,183,912.17/211,170.69
  6. Step 6: Final answer
    x = 159,639.50

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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.