Home / 90,234.20-135,059.70-70,405.40

Finding the Fourth Proportional to 90,234.20, 135,059.70 and 70,405.40

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Solution

The fourth proportional to 90,234.20, 135,059.70 and 70,405.40 is: 105,380.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,234.20 : 135,059.70 = 70,405.40 : x
  2. Step 2: Convert to fraction form
    90,234.20/135,059.70 = 70,405.40/x
  3. Step 3: Cross multiply
    90,234.20x = 135,059.70 × 70,405.40
  4. Step 4: Simplify right side
    90,234.20x = 9,508,932,202.38
  5. Step 5: Solve for x
    x = 9,508,932,202.38/90,234.20
  6. Step 6: Final answer
    x = 105,380.58

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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.