Home / 189,454.03-261,430-121,350.85

Finding the Fourth Proportional to 189,454.03, 261,430 and 121,350.85

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Solution

The fourth proportional to 189,454.03, 261,430 and 121,350.85 is: 167,453.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,454.03 : 261,430 = 121,350.85 : x
  2. Step 2: Convert to fraction form
    189,454.03/261,430 = 121,350.85/x
  3. Step 3: Cross multiply
    189,454.03x = 261,430 × 121,350.85
  4. Step 4: Simplify right side
    189,454.03x = 31,724,752,715.50
  5. Step 5: Solve for x
    x = 31,724,752,715.50/189,454.03
  6. Step 6: Final answer
    x = 167,453.56

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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.