Home / 280,917.36-421,388.34-81,257.93

Finding the Fourth Proportional to 280,917.36, 421,388.34 and 81,257.93

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Solution

The fourth proportional to 280,917.36, 421,388.34 and 81,257.93 is: 121,890.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,917.36 : 421,388.34 = 81,257.93 : x
  2. Step 2: Convert to fraction form
    280,917.36/421,388.34 = 81,257.93/x
  3. Step 3: Cross multiply
    280,917.36x = 421,388.34 × 81,257.93
  4. Step 4: Simplify right side
    280,917.36x = 34,241,142,127.59
  5. Step 5: Solve for x
    x = 34,241,142,127.59/280,917.36
  6. Step 6: Final answer
    x = 121,890.45

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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.