Home / 81,745,887.36-122,621,727.68-20,335,365.76

Finding the Fourth Proportional to 81,745,887.36, 122,621,727.68 and 20,335,365.76

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Solution

The fourth proportional to 81,745,887.36, 122,621,727.68 and 20,335,365.76 is: 30,503,769.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,745,887.36 : 122,621,727.68 = 20,335,365.76 : x
  2. Step 2: Convert to fraction form
    81,745,887.36/122,621,727.68 = 20,335,365.76/x
  3. Step 3: Cross multiply
    81,745,887.36x = 122,621,727.68 × 20,335,365.76
  4. Step 4: Simplify right side
    81,745,887.36x = 2,493,557,682,495,916.50
  5. Step 5: Solve for x
    x = 2,493,557,682,495,916.50/81,745,887.36
  6. Step 6: Final answer
    x = 30,503,769.22

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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.