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Finding the Fourth Proportional to 189,244.87, 261,155.80 and 103,203.56

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Solution

The fourth proportional to 189,244.87, 261,155.80 and 103,203.56 is: 142,419.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,244.87 : 261,155.80 = 103,203.56 : x
  2. Step 2: Convert to fraction form
    189,244.87/261,155.80 = 103,203.56/x
  3. Step 3: Cross multiply
    189,244.87x = 261,155.80 × 103,203.56
  4. Step 4: Simplify right side
    189,244.87x = 26,952,208,274.65
  5. Step 5: Solve for x
    x = 26,952,208,274.65/189,244.87
  6. Step 6: Final answer
    x = 142,419.76

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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.