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Finding the Fourth Proportional to 211,606.12, 316,993.74 and 122,672.68

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Solution

The fourth proportional to 211,606.12, 316,993.74 and 122,672.68 is: 183,768.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,606.12 : 316,993.74 = 122,672.68 : x
  2. Step 2: Convert to fraction form
    211,606.12/316,993.74 = 122,672.68/x
  3. Step 3: Cross multiply
    211,606.12x = 316,993.74 × 122,672.68
  4. Step 4: Simplify right side
    211,606.12x = 38,886,471,629.02
  5. Step 5: Solve for x
    x = 38,886,471,629.02/211,606.12
  6. Step 6: Final answer
    x = 183,768.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.