Home / 90,074.32-135,140.64-43,321.12

Finding the Fourth Proportional to 90,074.32, 135,140.64 and 43,321.12

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Solution

The fourth proportional to 90,074.32, 135,140.64 and 43,321.12 is: 64,995.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,074.32 : 135,140.64 = 43,321.12 : x
  2. Step 2: Convert to fraction form
    90,074.32/135,140.64 = 43,321.12/x
  3. Step 3: Cross multiply
    90,074.32x = 135,140.64 × 43,321.12
  4. Step 4: Simplify right side
    90,074.32x = 5,854,443,882.32
  5. Step 5: Solve for x
    x = 5,854,443,882.32/90,074.32
  6. Step 6: Final answer
    x = 64,995.70

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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.