Home / 128,181.34-192,256.08-80,154.14

Finding the Fourth Proportional to 128,181.34, 192,256.08 and 80,154.14

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Solution

The fourth proportional to 128,181.34, 192,256.08 and 80,154.14 is: 120,221.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,181.34 : 192,256.08 = 80,154.14 : x
  2. Step 2: Convert to fraction form
    128,181.34/192,256.08 = 80,154.14/x
  3. Step 3: Cross multiply
    128,181.34x = 192,256.08 × 80,154.14
  4. Step 4: Simplify right side
    128,181.34x = 15,410,120,109.85
  5. Step 5: Solve for x
    x = 15,410,120,109.85/128,181.34
  6. Step 6: Final answer
    x = 120,221.24

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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.