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Finding the Fourth Proportional to 67,287,716.60, 100,978,814.10 and 28,976,725.40

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Solution

The fourth proportional to 67,287,716.60, 100,978,814.10 and 28,976,725.40 is: 43,485,431.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,287,716.60 : 100,978,814.10 = 28,976,725.40 : x
  2. Step 2: Convert to fraction form
    67,287,716.60/100,978,814.10 = 28,976,725.40/x
  3. Step 3: Cross multiply
    67,287,716.60x = 100,978,814.10 × 28,976,725.40
  4. Step 4: Simplify right side
    67,287,716.60x = 2,926,035,367,393,348
  5. Step 5: Solve for x
    x = 2,926,035,367,393,348/67,287,716.60
  6. Step 6: Final answer
    x = 43,485,431.15

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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.