Home / 189,678.83-261,753.71-103,635.97

Finding the Fourth Proportional to 189,678.83, 261,753.71 and 103,635.97

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Solution

The fourth proportional to 189,678.83, 261,753.71 and 103,635.97 is: 143,015.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,678.83 : 261,753.71 = 103,635.97 : x
  2. Step 2: Convert to fraction form
    189,678.83/261,753.71 = 103,635.97/x
  3. Step 3: Cross multiply
    189,678.83x = 261,753.71 × 103,635.97
  4. Step 4: Simplify right side
    189,678.83x = 27,127,100,519.70
  5. Step 5: Solve for x
    x = 27,127,100,519.70/189,678.83
  6. Step 6: Final answer
    x = 143,015.96

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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.