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Finding the Fourth Proportional to 70,660,002.40, 105,990,003.60 and 40,426,914.40

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Solution

The fourth proportional to 70,660,002.40, 105,990,003.60 and 40,426,914.40 is: 60,640,371.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,660,002.40 : 105,990,003.60 = 40,426,914.40 : x
  2. Step 2: Convert to fraction form
    70,660,002.40/105,990,003.60 = 40,426,914.40/x
  3. Step 3: Cross multiply
    70,660,002.40x = 105,990,003.60 × 40,426,914.40
  4. Step 4: Simplify right side
    70,660,002.40x = 4,284,848,802,792,891.50
  5. Step 5: Solve for x
    x = 4,284,848,802,792,891.50/70,660,002.40
  6. Step 6: Final answer
    x = 60,640,371.60

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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.