Home / 84,129,812.40-126,194,718.60-80,161,719.60

Finding the Fourth Proportional to 84,129,812.40, 126,194,718.60 and 80,161,719.60

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Solution

The fourth proportional to 84,129,812.40, 126,194,718.60 and 80,161,719.60 is: 120,242,579.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,129,812.40 : 126,194,718.60 = 80,161,719.60 : x
  2. Step 2: Convert to fraction form
    84,129,812.40/126,194,718.60 = 80,161,719.60/x
  3. Step 3: Cross multiply
    84,129,812.40x = 126,194,718.60 × 80,161,719.60
  4. Step 4: Simplify right side
    84,129,812.40x = 10,115,985,647,414,104
  5. Step 5: Solve for x
    x = 10,115,985,647,414,104/84,129,812.40
  6. Step 6: Final answer
    x = 120,242,579.40

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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.