Home / 280,864.25-421,299.45-81,186.36

Finding the Fourth Proportional to 280,864.25, 421,299.45 and 81,186.36

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Solution

The fourth proportional to 280,864.25, 421,299.45 and 81,186.36 is: 121,780.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,864.25 : 421,299.45 = 81,186.36 : x
  2. Step 2: Convert to fraction form
    280,864.25/421,299.45 = 81,186.36/x
  3. Step 3: Cross multiply
    280,864.25x = 421,299.45 × 81,186.36
  4. Step 4: Simplify right side
    280,864.25x = 34,203,770,562.01
  5. Step 5: Solve for x
    x = 34,203,770,562.01/280,864.25
  6. Step 6: Final answer
    x = 121,780.44

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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.