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Finding the Fourth Proportional to 85,998,993.15, 120,738,712.65 and 85,998,993.15

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Solution

The fourth proportional to 85,998,993.15, 120,738,712.65 and 85,998,993.15 is: 120,738,712.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,998,993.15 : 120,738,712.65 = 85,998,993.15 : x
  2. Step 2: Convert to fraction form
    85,998,993.15/120,738,712.65 = 85,998,993.15/x
  3. Step 3: Cross multiply
    85,998,993.15x = 120,738,712.65 × 85,998,993.15
  4. Step 4: Simplify right side
    85,998,993.15x = 10,383,407,722,127,170
  5. Step 5: Solve for x
    x = 10,383,407,722,127,170/85,998,993.15
  6. Step 6: Final answer
    x = 120,738,712.65

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.