Home / 280,921.49-421,394.54-81,262.06

Finding the Fourth Proportional to 280,921.49, 421,394.54 and 81,262.06

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Solution

The fourth proportional to 280,921.49, 421,394.54 and 81,262.06 is: 121,896.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,921.49 : 421,394.54 = 81,262.06 : x
  2. Step 2: Convert to fraction form
    280,921.49/421,394.54 = 81,262.06/x
  3. Step 3: Cross multiply
    280,921.49x = 421,394.54 × 81,262.06
  4. Step 4: Simplify right side
    280,921.49x = 34,243,385,879.87
  5. Step 5: Solve for x
    x = 34,243,385,879.87/280,921.49
  6. Step 6: Final answer
    x = 121,896.64

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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.