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Finding the Fourth Proportional to 78,814,978, 108,764,020.32 and 43,051,448.40

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Solution

The fourth proportional to 78,814,978, 108,764,020.32 and 43,051,448.40 is: 59,410,644.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,814,978 : 108,764,020.32 = 43,051,448.40 : x
  2. Step 2: Convert to fraction form
    78,814,978/108,764,020.32 = 43,051,448.40/x
  3. Step 3: Cross multiply
    78,814,978x = 108,764,020.32 × 43,051,448.40
  4. Step 4: Simplify right side
    78,814,978x = 4,682,448,608,583,031
  5. Step 5: Solve for x
    x = 4,682,448,608,583,031/78,814,978
  6. Step 6: Final answer
    x = 59,410,644.11

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.