Home / 210,991.23-291,171.11-115,506.81

Finding the Fourth Proportional to 210,991.23, 291,171.11 and 115,506.81

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Solution

The fourth proportional to 210,991.23, 291,171.11 and 115,506.81 is: 159,401.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,991.23 : 291,171.11 = 115,506.81 : x
  2. Step 2: Convert to fraction form
    210,991.23/291,171.11 = 115,506.81/x
  3. Step 3: Cross multiply
    210,991.23x = 291,171.11 × 115,506.81
  4. Step 4: Simplify right side
    210,991.23x = 33,632,245,502.73
  5. Step 5: Solve for x
    x = 33,632,245,502.73/210,991.23
  6. Step 6: Final answer
    x = 159,401.15

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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.