Home / 211,515.66-317,115.70-127,256.09

Finding the Fourth Proportional to 211,515.66, 317,115.70 and 127,256.09

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Solution

The fourth proportional to 211,515.66, 317,115.70 and 127,256.09 is: 190,789.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,515.66 : 317,115.70 = 127,256.09 : x
  2. Step 2: Convert to fraction form
    211,515.66/317,115.70 = 127,256.09/x
  3. Step 3: Cross multiply
    211,515.66x = 317,115.70 × 127,256.09
  4. Step 4: Simplify right side
    211,515.66x = 40,354,902,155.89
  5. Step 5: Solve for x
    x = 40,354,902,155.89/211,515.66
  6. Step 6: Final answer
    x = 190,789.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.