Home / 280,172.40-420,003.45-102,636.60

Finding the Fourth Proportional to 280,172.40, 420,003.45 and 102,636.60

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Solution

The fourth proportional to 280,172.40, 420,003.45 and 102,636.60 is: 153,861.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,172.40 : 420,003.45 = 102,636.60 : x
  2. Step 2: Convert to fraction form
    280,172.40/420,003.45 = 102,636.60/x
  3. Step 3: Cross multiply
    280,172.40x = 420,003.45 × 102,636.60
  4. Step 4: Simplify right side
    280,172.40x = 43,107,726,096.27
  5. Step 5: Solve for x
    x = 43,107,726,096.27/280,172.40
  6. Step 6: Final answer
    x = 153,861.43

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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.