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Finding the Fourth Proportional to 28,978,711.40, 43,468,067.10 and 21,751,113.80

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Solution

The fourth proportional to 28,978,711.40, 43,468,067.10 and 21,751,113.80 is: 32,626,670.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978,711.40 : 43,468,067.10 = 21,751,113.80 : x
  2. Step 2: Convert to fraction form
    28,978,711.40/43,468,067.10 = 21,751,113.80/x
  3. Step 3: Cross multiply
    28,978,711.40x = 43,468,067.10 × 21,751,113.80
  4. Step 4: Simplify right side
    28,978,711.40x = 945,478,874,158,136
  5. Step 5: Solve for x
    x = 945,478,874,158,136/28,978,711.40
  6. Step 6: Final answer
    x = 32,626,670.70

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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.