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Finding the Fourth Proportional to 201,211.40, 301,379.70 and 122,187.80

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Solution

The fourth proportional to 201,211.40, 301,379.70 and 122,187.80 is: 183,016.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,211.40 : 301,379.70 = 122,187.80 : x
  2. Step 2: Convert to fraction form
    201,211.40/301,379.70 = 122,187.80/x
  3. Step 3: Cross multiply
    201,211.40x = 301,379.70 × 122,187.80
  4. Step 4: Simplify right side
    201,211.40x = 36,824,922,507.66
  5. Step 5: Solve for x
    x = 36,824,922,507.66/201,211.40
  6. Step 6: Final answer
    x = 183,016.08

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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.