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Finding the Fourth Proportional to 28,978,710.40, 43,468,065.60 and 21,751,112.80

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Solution

The fourth proportional to 28,978,710.40, 43,468,065.60 and 21,751,112.80 is: 32,626,669.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978,710.40 : 43,468,065.60 = 21,751,112.80 : x
  2. Step 2: Convert to fraction form
    28,978,710.40/43,468,065.60 = 21,751,112.80/x
  3. Step 3: Cross multiply
    28,978,710.40x = 43,468,065.60 × 21,751,112.80
  4. Step 4: Simplify right side
    28,978,710.40x = 945,478,798,063,399.75
  5. Step 5: Solve for x
    x = 945,478,798,063,399.75/28,978,710.40
  6. Step 6: Final answer
    x = 32,626,669.20

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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.