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Finding the Fourth Proportional to 67,287,715.60, 100,978,812.60 and 28,976,724.40

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Solution

The fourth proportional to 67,287,715.60, 100,978,812.60 and 28,976,724.40 is: 43,485,429.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,287,715.60 : 100,978,812.60 = 28,976,724.40 : x
  2. Step 2: Convert to fraction form
    67,287,715.60/100,978,812.60 = 28,976,724.40/x
  3. Step 3: Cross multiply
    67,287,715.60x = 100,978,812.60 × 28,976,724.40
  4. Step 4: Simplify right side
    67,287,715.60x = 2,926,035,222,949,447
  5. Step 5: Solve for x
    x = 2,926,035,222,949,447/67,287,715.60
  6. Step 6: Final answer
    x = 43,485,429.65

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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.