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Finding the Fourth Proportional to 28,679,896.80, 43,019,845.20 and 26,412,415.20

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Solution

The fourth proportional to 28,679,896.80, 43,019,845.20 and 26,412,415.20 is: 39,618,622.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,679,896.80 : 43,019,845.20 = 26,412,415.20 : x
  2. Step 2: Convert to fraction form
    28,679,896.80/43,019,845.20 = 26,412,415.20/x
  3. Step 3: Cross multiply
    28,679,896.80x = 43,019,845.20 × 26,412,415.20
  4. Step 4: Simplify right side
    28,679,896.80x = 1,136,258,013,262,127
  5. Step 5: Solve for x
    x = 1,136,258,013,262,127/28,679,896.80
  6. Step 6: Final answer
    x = 39,618,622.80

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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.