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Finding the Fourth Proportional to 70,447,943.20, 105,771,447.60 and 43,574,087.20

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Solution

The fourth proportional to 70,447,943.20, 105,771,447.60 and 43,574,087.20 is: 65,422,694.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,447,943.20 : 105,771,447.60 = 43,574,087.20 : x
  2. Step 2: Convert to fraction form
    70,447,943.20/105,771,447.60 = 43,574,087.20/x
  3. Step 3: Cross multiply
    70,447,943.20x = 105,771,447.60 × 43,574,087.20
  4. Step 4: Simplify right side
    70,447,943.20x = 4,608,894,280,992,631
  5. Step 5: Solve for x
    x = 4,608,894,280,992,631/70,447,943.20
  6. Step 6: Final answer
    x = 65,422,694.71

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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.