Home / 86,764.91-129,787.47-81,450.50

Finding the Fourth Proportional to 86,764.91, 129,787.47 and 81,450.50

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Solution

The fourth proportional to 86,764.91, 129,787.47 and 81,450.50 is: 121,837.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,764.91 : 129,787.47 = 81,450.50 : x
  2. Step 2: Convert to fraction form
    86,764.91/129,787.47 = 81,450.50/x
  3. Step 3: Cross multiply
    86,764.91x = 129,787.47 × 81,450.50
  4. Step 4: Simplify right side
    86,764.91x = 10,571,253,676.30
  5. Step 5: Solve for x
    x = 10,571,253,676.30/86,764.91
  6. Step 6: Final answer
    x = 121,837.90

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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.