Home / 90,321.38-135,486.40-43,613.54

Finding the Fourth Proportional to 90,321.38, 135,486.40 and 43,613.54

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Solution

The fourth proportional to 90,321.38, 135,486.40 and 43,613.54 is: 65,422.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,321.38 : 135,486.40 = 43,613.54 : x
  2. Step 2: Convert to fraction form
    90,321.38/135,486.40 = 43,613.54/x
  3. Step 3: Cross multiply
    90,321.38x = 135,486.40 × 43,613.54
  4. Step 4: Simplify right side
    90,321.38x = 5,909,041,525.86
  5. Step 5: Solve for x
    x = 5,909,041,525.86/90,321.38
  6. Step 6: Final answer
    x = 65,422.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.