Home / 81,378.87-122,095.03-51,358.34

Finding the Fourth Proportional to 81,378.87, 122,095.03 and 51,358.34

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Solution

The fourth proportional to 81,378.87, 122,095.03 and 51,358.34 is: 77,054.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,378.87 : 122,095.03 = 51,358.34 : x
  2. Step 2: Convert to fraction form
    81,378.87/122,095.03 = 51,358.34/x
  3. Step 3: Cross multiply
    81,378.87x = 122,095.03 × 51,358.34
  4. Step 4: Simplify right side
    81,378.87x = 6,270,598,063.05
  5. Step 5: Solve for x
    x = 6,270,598,063.05/81,378.87
  6. Step 6: Final answer
    x = 77,054.38

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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.