Home / 280,992.17-421,709.67-103,623.72

Finding the Fourth Proportional to 280,992.17, 421,709.67 and 103,623.72

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Solution

The fourth proportional to 280,992.17, 421,709.67 and 103,623.72 is: 155,517.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,992.17 : 421,709.67 = 103,623.72 : x
  2. Step 2: Convert to fraction form
    280,992.17/421,709.67 = 103,623.72/x
  3. Step 3: Cross multiply
    280,992.17x = 421,709.67 × 103,623.72
  4. Step 4: Simplify right side
    280,992.17x = 43,699,124,765.37
  5. Step 5: Solve for x
    x = 43,699,124,765.37/280,992.17
  6. Step 6: Final answer
    x = 155,517.23

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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.