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Finding the Fourth Proportional to 197,667.36, 272,779 and 107,021

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Solution

The fourth proportional to 197,667.36, 272,779 and 107,021 is: 147,687.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    197,667.36 : 272,779 = 107,021 : x
  2. Step 2: Convert to fraction form
    197,667.36/272,779 = 107,021/x
  3. Step 3: Cross multiply
    197,667.36x = 272,779 × 107,021
  4. Step 4: Simplify right side
    197,667.36x = 29,193,081,359
  5. Step 5: Solve for x
    x = 29,193,081,359/197,667.36
  6. Step 6: Final answer
    x = 147,687.92

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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.