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Finding the Fourth Proportional to 70,118,782.80, 105,183,460.97 and 20,930,750.54

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Solution

The fourth proportional to 70,118,782.80, 105,183,460.97 and 20,930,750.54 is: 31,397,703.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,118,782.80 : 105,183,460.97 = 20,930,750.54 : x
  2. Step 2: Convert to fraction form
    70,118,782.80/105,183,460.97 = 20,930,750.54/x
  3. Step 3: Cross multiply
    70,118,782.80x = 105,183,460.97 × 20,930,750.54
  4. Step 4: Simplify right side
    70,118,782.80x = 2,201,568,782,496,896.25
  5. Step 5: Solve for x
    x = 2,201,568,782,496,896.25/70,118,782.80
  6. Step 6: Final answer
    x = 31,397,703.93

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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.