Home / 81,193,784.40-121,790,676.60-55,365,751.80

Finding the Fourth Proportional to 81,193,784.40, 121,790,676.60 and 55,365,751.80

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Solution

The fourth proportional to 81,193,784.40, 121,790,676.60 and 55,365,751.80 is: 83,048,627.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,193,784.40 : 121,790,676.60 = 55,365,751.80 : x
  2. Step 2: Convert to fraction form
    81,193,784.40/121,790,676.60 = 55,365,751.80/x
  3. Step 3: Cross multiply
    81,193,784.40x = 121,790,676.60 × 55,365,751.80
  4. Step 4: Simplify right side
    81,193,784.40x = 6,743,032,372,189,667
  5. Step 5: Solve for x
    x = 6,743,032,372,189,667/81,193,784.40
  6. Step 6: Final answer
    x = 83,048,627.70

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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.