Home / 287,109.75-430,631.82-76,764.09

Finding the Fourth Proportional to 287,109.75, 430,631.82 and 76,764.09

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Solution

The fourth proportional to 287,109.75, 430,631.82 and 76,764.09 is: 115,137.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,109.75 : 430,631.82 = 76,764.09 : x
  2. Step 2: Convert to fraction form
    287,109.75/430,631.82 = 76,764.09/x
  3. Step 3: Cross multiply
    287,109.75x = 430,631.82 × 76,764.09
  4. Step 4: Simplify right side
    287,109.75x = 33,057,059,787.34
  5. Step 5: Solve for x
    x = 33,057,059,787.34/287,109.75
  6. Step 6: Final answer
    x = 115,137.36

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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.