Home / 189,394.20-261,127.66-121,299.28

Finding the Fourth Proportional to 189,394.20, 261,127.66 and 121,299.28

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Solution

The fourth proportional to 189,394.20, 261,127.66 and 121,299.28 is: 167,241.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,394.20 : 261,127.66 = 121,299.28 : x
  2. Step 2: Convert to fraction form
    189,394.20/261,127.66 = 121,299.28/x
  3. Step 3: Cross multiply
    189,394.20x = 261,127.66 × 121,299.28
  4. Step 4: Simplify right side
    189,394.20x = 31,674,597,146.08
  5. Step 5: Solve for x
    x = 31,674,597,146.08/189,394.20
  6. Step 6: Final answer
    x = 167,241.64

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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.