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Finding the Fourth Proportional to 197,978.69, 273,190.13 and 121,501.01

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Solution

The fourth proportional to 197,978.69, 273,190.13 and 121,501.01 is: 167,658.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    197,978.69 : 273,190.13 = 121,501.01 : x
  2. Step 2: Convert to fraction form
    197,978.69/273,190.13 = 121,501.01/x
  3. Step 3: Cross multiply
    197,978.69x = 273,190.13 × 121,501.01
  4. Step 4: Simplify right side
    197,978.69x = 33,192,875,351.08
  5. Step 5: Solve for x
    x = 33,192,875,351.08/197,978.69
  6. Step 6: Final answer
    x = 167,658.83

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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.