Home / 211,515.89-317,116.05-127,256.32

Finding the Fourth Proportional to 211,515.89, 317,116.05 and 127,256.32

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Solution

The fourth proportional to 211,515.89, 317,116.05 and 127,256.32 is: 190,789.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,515.89 : 317,116.05 = 127,256.32 : x
  2. Step 2: Convert to fraction form
    211,515.89/317,116.05 = 127,256.32/x
  3. Step 3: Cross multiply
    211,515.89x = 317,116.05 × 127,256.32
  4. Step 4: Simplify right side
    211,515.89x = 40,355,020,208.20
  5. Step 5: Solve for x
    x = 40,355,020,208.20/211,515.89
  6. Step 6: Final answer
    x = 190,789.54

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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.