Home / 211,036.57-291,258.18-120,371.72

Finding the Fourth Proportional to 211,036.57, 291,258.18 and 120,371.72

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Solution

The fourth proportional to 211,036.57, 291,258.18 and 120,371.72 is: 166,128.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,036.57 : 291,258.18 = 120,371.72 : x
  2. Step 2: Convert to fraction form
    211,036.57/291,258.18 = 120,371.72/x
  3. Step 3: Cross multiply
    211,036.57x = 291,258.18 × 120,371.72
  4. Step 4: Simplify right side
    211,036.57x = 35,059,246,634.38
  5. Step 5: Solve for x
    x = 35,059,246,634.38/211,036.57
  6. Step 6: Final answer
    x = 166,128.78

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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.