Home / 100,728,098.40-151,092,147.60-78,809,109.60

Finding the Fourth Proportional to 100,728,098.40, 151,092,147.60 and 78,809,109.60

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Solution

The fourth proportional to 100,728,098.40, 151,092,147.60 and 78,809,109.60 is: 118,213,664.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,728,098.40 : 151,092,147.60 = 78,809,109.60 : x
  2. Step 2: Convert to fraction form
    100,728,098.40/151,092,147.60 = 78,809,109.60/x
  3. Step 3: Cross multiply
    100,728,098.40x = 151,092,147.60 × 78,809,109.60
  4. Step 4: Simplify right side
    100,728,098.40x = 11,907,437,619,907,776
  5. Step 5: Solve for x
    x = 11,907,437,619,907,776/100,728,098.40
  6. Step 6: Final answer
    x = 118,213,664.40

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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.