Home / 149,219.87-205,921.37-81,237.42

Finding the Fourth Proportional to 149,219.87, 205,921.37 and 81,237.42

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Solution

The fourth proportional to 149,219.87, 205,921.37 and 81,237.42 is: 112,106.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,219.87 : 205,921.37 = 81,237.42 : x
  2. Step 2: Convert to fraction form
    149,219.87/205,921.37 = 81,237.42/x
  3. Step 3: Cross multiply
    149,219.87x = 205,921.37 × 81,237.42
  4. Step 4: Simplify right side
    149,219.87x = 16,728,520,415.48
  5. Step 5: Solve for x
    x = 16,728,520,415.48/149,219.87
  6. Step 6: Final answer
    x = 112,106.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.