Home / 127,872.06-191,863.40-68,638.56

Finding the Fourth Proportional to 127,872.06, 191,863.40 and 68,638.56

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Solution

The fourth proportional to 127,872.06, 191,863.40 and 68,638.56 is: 102,987.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,872.06 : 191,863.40 = 68,638.56 : x
  2. Step 2: Convert to fraction form
    127,872.06/191,863.40 = 68,638.56/x
  3. Step 3: Cross multiply
    127,872.06x = 191,863.40 × 68,638.56
  4. Step 4: Simplify right side
    127,872.06x = 13,169,227,492.70
  5. Step 5: Solve for x
    x = 13,169,227,492.70/127,872.06
  6. Step 6: Final answer
    x = 102,987.53

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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.