Home / 109,029.30-150,370.40-76,871.09

Finding the Fourth Proportional to 109,029.30, 150,370.40 and 76,871.09

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Solution

The fourth proportional to 109,029.30, 150,370.40 and 76,871.09 is: 106,018.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,029.30 : 150,370.40 = 76,871.09 : x
  2. Step 2: Convert to fraction form
    109,029.30/150,370.40 = 76,871.09/x
  3. Step 3: Cross multiply
    109,029.30x = 150,370.40 × 76,871.09
  4. Step 4: Simplify right side
    109,029.30x = 11,559,135,415.53
  5. Step 5: Solve for x
    x = 11,559,135,415.53/109,029.30
  6. Step 6: Final answer
    x = 106,018.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.