Home / 189,682.28-261,758.44-103,639.40

Finding the Fourth Proportional to 189,682.28, 261,758.44 and 103,639.40

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Solution

The fourth proportional to 189,682.28, 261,758.44 and 103,639.40 is: 143,020.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,682.28 : 261,758.44 = 103,639.40 : x
  2. Step 2: Convert to fraction form
    189,682.28/261,758.44 = 103,639.40/x
  3. Step 3: Cross multiply
    189,682.28x = 261,758.44 × 103,639.40
  4. Step 4: Simplify right side
    189,682.28x = 27,128,487,666.54
  5. Step 5: Solve for x
    x = 27,128,487,666.54/189,682.28
  6. Step 6: Final answer
    x = 143,020.67

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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.