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Finding the Fourth Proportional to 70,546,661.80, 105,819,992.70 and 40,257,586.60

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Solution

The fourth proportional to 70,546,661.80, 105,819,992.70 and 40,257,586.60 is: 60,386,379.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,546,661.80 : 105,819,992.70 = 40,257,586.60 : x
  2. Step 2: Convert to fraction form
    70,546,661.80/105,819,992.70 = 40,257,586.60/x
  3. Step 3: Cross multiply
    70,546,661.80x = 105,819,992.70 × 40,257,586.60
  4. Step 4: Simplify right side
    70,546,661.80x = 4,260,057,520,131,618
  5. Step 5: Solve for x
    x = 4,260,057,520,131,618/70,546,661.80
  6. Step 6: Final answer
    x = 60,386,379.90

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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.