Home / 189,189.20-261,112.20-113,779.28

Finding the Fourth Proportional to 189,189.20, 261,112.20 and 113,779.28

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Solution

The fourth proportional to 189,189.20, 261,112.20 and 113,779.28 is: 157,034.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,189.20 : 261,112.20 = 113,779.28 : x
  2. Step 2: Convert to fraction form
    189,189.20/261,112.20 = 113,779.28/x
  3. Step 3: Cross multiply
    189,189.20x = 261,112.20 × 113,779.28
  4. Step 4: Simplify right side
    189,189.20x = 29,709,158,115.22
  5. Step 5: Solve for x
    x = 29,709,158,115.22/189,189.20
  6. Step 6: Final answer
    x = 157,034.11

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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.