Home / 189,546.17-261,678.77-129,205.47

Finding the Fourth Proportional to 189,546.17, 261,678.77 and 129,205.47

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Solution

The fourth proportional to 189,546.17, 261,678.77 and 129,205.47 is: 178,375.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,546.17 : 261,678.77 = 129,205.47 : x
  2. Step 2: Convert to fraction form
    189,546.17/261,678.77 = 129,205.47/x
  3. Step 3: Cross multiply
    189,546.17x = 261,678.77 × 129,205.47
  4. Step 4: Simplify right side
    189,546.17x = 33,810,328,789.89
  5. Step 5: Solve for x
    x = 33,810,328,789.89/189,546.17
  6. Step 6: Final answer
    x = 178,375.17

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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.