Home / 81,785.45-122,678.03-25,629.87

Finding the Fourth Proportional to 81,785.45, 122,678.03 and 25,629.87

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Solution

The fourth proportional to 81,785.45, 122,678.03 and 25,629.87 is: 38,444.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,785.45 : 122,678.03 = 25,629.87 : x
  2. Step 2: Convert to fraction form
    81,785.45/122,678.03 = 25,629.87/x
  3. Step 3: Cross multiply
    81,785.45x = 122,678.03 × 25,629.87
  4. Step 4: Simplify right side
    81,785.45x = 3,144,221,960.76
  5. Step 5: Solve for x
    x = 3,144,221,960.76/81,785.45
  6. Step 6: Final answer
    x = 38,444.76

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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.