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Finding the Fourth Proportional to 189,615.89, 261,668.14 and 103,574.84

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Solution

The fourth proportional to 189,615.89, 261,668.14 and 103,574.84 is: 142,932.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,615.89 : 261,668.14 = 103,574.84 : x
  2. Step 2: Convert to fraction form
    189,615.89/261,668.14 = 103,574.84/x
  3. Step 3: Cross multiply
    189,615.89x = 261,668.14 × 103,574.84
  4. Step 4: Simplify right side
    189,615.89x = 27,102,234,166.32
  5. Step 5: Solve for x
    x = 27,102,234,166.32/189,615.89
  6. Step 6: Final answer
    x = 142,932.29

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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.