Home / 123,639.24-185,453.90-86,090.84

Finding the Fourth Proportional to 123,639.24, 185,453.90 and 86,090.84

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Solution

The fourth proportional to 123,639.24, 185,453.90 and 86,090.84 is: 129,132.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,639.24 : 185,453.90 = 86,090.84 : x
  2. Step 2: Convert to fraction form
    123,639.24/185,453.90 = 86,090.84/x
  3. Step 3: Cross multiply
    123,639.24x = 185,453.90 × 86,090.84
  4. Step 4: Simplify right side
    123,639.24x = 15,965,882,032.28
  5. Step 5: Solve for x
    x = 15,965,882,032.28/123,639.24
  6. Step 6: Final answer
    x = 129,132.81

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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.