Home / 280,631.46-420,684.75-103,090.80

Finding the Fourth Proportional to 280,631.46, 420,684.75 and 103,090.80

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Solution

The fourth proportional to 280,631.46, 420,684.75 and 103,090.80 is: 154,539.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,631.46 : 420,684.75 = 103,090.80 : x
  2. Step 2: Convert to fraction form
    280,631.46/420,684.75 = 103,090.80/x
  3. Step 3: Cross multiply
    280,631.46x = 420,684.75 × 103,090.80
  4. Step 4: Simplify right side
    280,631.46x = 43,368,727,425.30
  5. Step 5: Solve for x
    x = 43,368,727,425.30/280,631.46
  6. Step 6: Final answer
    x = 154,539.79

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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.