Home / 189,877.39-261,907.29-121,786.46

Finding the Fourth Proportional to 189,877.39, 261,907.29 and 121,786.46

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Solution

The fourth proportional to 189,877.39, 261,907.29 and 121,786.46 is: 167,986.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,877.39 : 261,907.29 = 121,786.46 : x
  2. Step 2: Convert to fraction form
    189,877.39/261,907.29 = 121,786.46/x
  3. Step 3: Cross multiply
    189,877.39x = 261,907.29 × 121,786.46
  4. Step 4: Simplify right side
    189,877.39x = 31,896,761,697.29
  5. Step 5: Solve for x
    x = 31,896,761,697.29/189,877.39
  6. Step 6: Final answer
    x = 167,986.10

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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.