Home / 81,038.72-121,496.11-66,954.44

Finding the Fourth Proportional to 81,038.72, 121,496.11 and 66,954.44

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Solution

The fourth proportional to 81,038.72, 121,496.11 and 66,954.44 is: 100,380.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,038.72 : 121,496.11 = 66,954.44 : x
  2. Step 2: Convert to fraction form
    81,038.72/121,496.11 = 66,954.44/x
  3. Step 3: Cross multiply
    81,038.72x = 121,496.11 × 66,954.44
  4. Step 4: Simplify right side
    81,038.72x = 8,134,704,007.23
  5. Step 5: Solve for x
    x = 8,134,704,007.23/81,038.72
  6. Step 6: Final answer
    x = 100,380.46

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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.