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Finding the Fourth Proportional to 28,978,872.60, 43,468,308.90 and 20,475,816.60

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Solution

The fourth proportional to 28,978,872.60, 43,468,308.90 and 20,475,816.60 is: 30,713,724.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978,872.60 : 43,468,308.90 = 20,475,816.60 : x
  2. Step 2: Convert to fraction form
    28,978,872.60/43,468,308.90 = 20,475,816.60/x
  3. Step 3: Cross multiply
    28,978,872.60x = 43,468,308.90 × 20,475,816.60
  4. Step 4: Simplify right side
    28,978,872.60x = 890,049,120,948,547.75
  5. Step 5: Solve for x
    x = 890,049,120,948,547.75/28,978,872.60
  6. Step 6: Final answer
    x = 30,713,724.90

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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.