Home / 138,401.53-190,994.54-80,269.54

Finding the Fourth Proportional to 138,401.53, 190,994.54 and 80,269.54

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Solution

The fourth proportional to 138,401.53, 190,994.54 and 80,269.54 is: 110,772.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,401.53 : 190,994.54 = 80,269.54 : x
  2. Step 2: Convert to fraction form
    138,401.53/190,994.54 = 80,269.54/x
  3. Step 3: Cross multiply
    138,401.53x = 190,994.54 × 80,269.54
  4. Step 4: Simplify right side
    138,401.53x = 15,331,042,989.48
  5. Step 5: Solve for x
    x = 15,331,042,989.48/138,401.53
  6. Step 6: Final answer
    x = 110,772.21

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1.5x scale

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.