Home / 91,189.20-125,854.31-65,779.77

Finding the Fourth Proportional to 91,189.20, 125,854.31 and 65,779.77

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Solution

The fourth proportional to 91,189.20, 125,854.31 and 65,779.77 is: 90,785.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,189.20 : 125,854.31 = 65,779.77 : x
  2. Step 2: Convert to fraction form
    91,189.20/125,854.31 = 65,779.77/x
  3. Step 3: Cross multiply
    91,189.20x = 125,854.31 × 65,779.77
  4. Step 4: Simplify right side
    91,189.20x = 8,278,667,565.31
  5. Step 5: Solve for x
    x = 8,278,667,565.31/91,189.20
  6. Step 6: Final answer
    x = 90,785.61

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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.