Home / 211,519.20-291,816-135,041.16

Finding the Fourth Proportional to 211,519.20, 291,816 and 135,041.16

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Solution

The fourth proportional to 211,519.20, 291,816 and 135,041.16 is: 186,305.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,519.20 : 291,816 = 135,041.16 : x
  2. Step 2: Convert to fraction form
    211,519.20/291,816 = 135,041.16/x
  3. Step 3: Cross multiply
    211,519.20x = 291,816 × 135,041.16
  4. Step 4: Simplify right side
    211,519.20x = 39,407,171,146.56
  5. Step 5: Solve for x
    x = 39,407,171,146.56/211,519.20
  6. Step 6: Final answer
    x = 186,305.41

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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.