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Finding the Fourth Proportional to 28,978,957.20, 43,468,435.80 and 15,542,029.20

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Solution

The fourth proportional to 28,978,957.20, 43,468,435.80 and 15,542,029.20 is: 23,313,043.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978,957.20 : 43,468,435.80 = 15,542,029.20 : x
  2. Step 2: Convert to fraction form
    28,978,957.20/43,468,435.80 = 15,542,029.20/x
  3. Step 3: Cross multiply
    28,978,957.20x = 43,468,435.80 × 15,542,029.20
  4. Step 4: Simplify right side
    28,978,957.20x = 675,587,698,481,925.25
  5. Step 5: Solve for x
    x = 675,587,698,481,925.25/28,978,957.20
  6. Step 6: Final answer
    x = 23,313,043.80

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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.