Home / 128,500.32-192,749.34-100,443.96

Finding the Fourth Proportional to 128,500.32, 192,749.34 and 100,443.96

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Solution

The fourth proportional to 128,500.32, 192,749.34 and 100,443.96 is: 150,665.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,500.32 : 192,749.34 = 100,443.96 : x
  2. Step 2: Convert to fraction form
    128,500.32/192,749.34 = 100,443.96/x
  3. Step 3: Cross multiply
    128,500.32x = 192,749.34 × 100,443.96
  4. Step 4: Simplify right side
    128,500.32x = 19,360,506,996.99
  5. Step 5: Solve for x
    x = 19,360,506,996.99/128,500.32
  6. Step 6: Final answer
    x = 150,665.05

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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.