Home / 128,138.10-192,401.55-98,589.30

Finding the Fourth Proportional to 128,138.10, 192,401.55 and 98,589.30

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Solution

The fourth proportional to 128,138.10, 192,401.55 and 98,589.30 is: 148,033.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,138.10 : 192,401.55 = 98,589.30 : x
  2. Step 2: Convert to fraction form
    128,138.10/192,401.55 = 98,589.30/x
  3. Step 3: Cross multiply
    128,138.10x = 192,401.55 × 98,589.30
  4. Step 4: Simplify right side
    128,138.10x = 18,968,734,133.42
  5. Step 5: Solve for x
    x = 18,968,734,133.42/128,138.10
  6. Step 6: Final answer
    x = 148,033.52

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1.5x scale

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.