Home / 211,455.40-291,821.94-139,709.56

Finding the Fourth Proportional to 211,455.40, 291,821.94 and 139,709.56

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Solution

The fourth proportional to 211,455.40, 291,821.94 and 139,709.56 is: 192,808.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,455.40 : 291,821.94 = 139,709.56 : x
  2. Step 2: Convert to fraction form
    211,455.40/291,821.94 = 139,709.56/x
  3. Step 3: Cross multiply
    211,455.40x = 291,821.94 × 139,709.56
  4. Step 4: Simplify right side
    211,455.40x = 40,770,314,835.75
  5. Step 5: Solve for x
    x = 40,770,314,835.75/211,455.40
  6. Step 6: Final answer
    x = 192,808.10

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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.