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Finding the Fourth Proportional to 28,978,047.70, 43,467,071.55 and 21,325,297.30

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Solution

The fourth proportional to 28,978,047.70, 43,467,071.55 and 21,325,297.30 is: 31,987,945.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978,047.70 : 43,467,071.55 = 21,325,297.30 : x
  2. Step 2: Convert to fraction form
    28,978,047.70/43,467,071.55 = 21,325,297.30/x
  3. Step 3: Cross multiply
    28,978,047.70x = 43,467,071.55 × 21,325,297.30
  4. Step 4: Simplify right side
    28,978,047.70x = 926,948,223,564,121.75
  5. Step 5: Solve for x
    x = 926,948,223,564,121.75/28,978,047.70
  6. Step 6: Final answer
    x = 31,987,945.95

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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.