Home / 149,383.76-206,147.12-81,401.56

Finding the Fourth Proportional to 149,383.76, 206,147.12 and 81,401.56

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Solution

The fourth proportional to 149,383.76, 206,147.12 and 81,401.56 is: 112,332.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,383.76 : 206,147.12 = 81,401.56 : x
  2. Step 2: Convert to fraction form
    149,383.76/206,147.12 = 81,401.56/x
  3. Step 3: Cross multiply
    149,383.76x = 206,147.12 × 81,401.56
  4. Step 4: Simplify right side
    149,383.76x = 16,780,697,157.51
  5. Step 5: Solve for x
    x = 16,780,697,157.51/149,383.76
  6. Step 6: Final answer
    x = 112,332.81

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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.