Home / 211,520.45-291,857.82-120,905.15

Finding the Fourth Proportional to 211,520.45, 291,857.82 and 120,905.15

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Solution

The fourth proportional to 211,520.45, 291,857.82 and 120,905.15 is: 166,826.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,520.45 : 291,857.82 = 120,905.15 : x
  2. Step 2: Convert to fraction form
    211,520.45/291,857.82 = 120,905.15/x
  3. Step 3: Cross multiply
    211,520.45x = 291,857.82 × 120,905.15
  4. Step 4: Simplify right side
    211,520.45x = 35,287,112,046.48
  5. Step 5: Solve for x
    x = 35,287,112,046.48/211,520.45
  6. Step 6: Final answer
    x = 166,826.01

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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.