Home / 81,079,029.72-121,618,544.58-20,494,755.72

Finding the Fourth Proportional to 81,079,029.72, 121,618,544.58 and 20,494,755.72

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Solution

The fourth proportional to 81,079,029.72, 121,618,544.58 and 20,494,755.72 is: 30,742,133.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,079,029.72 : 121,618,544.58 = 20,494,755.72 : x
  2. Step 2: Convert to fraction form
    81,079,029.72/121,618,544.58 = 20,494,755.72/x
  3. Step 3: Cross multiply
    81,079,029.72x = 121,618,544.58 × 20,494,755.72
  4. Step 4: Simplify right side
    81,079,029.72x = 2,492,542,362,189,030
  5. Step 5: Solve for x
    x = 2,492,542,362,189,030/81,079,029.72
  6. Step 6: Final answer
    x = 30,742,133.58

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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.