Home / 187,128.09-280,719.81-68,790.13

Finding the Fourth Proportional to 187,128.09, 280,719.81 and 68,790.13

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Solution

The fourth proportional to 187,128.09, 280,719.81 and 68,790.13 is: 103,195.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,128.09 : 280,719.81 = 68,790.13 : x
  2. Step 2: Convert to fraction form
    187,128.09/280,719.81 = 68,790.13/x
  3. Step 3: Cross multiply
    187,128.09x = 280,719.81 × 68,790.13
  4. Step 4: Simplify right side
    187,128.09x = 19,310,751,521.68
  5. Step 5: Solve for x
    x = 19,310,751,521.68/187,128.09
  6. Step 6: Final answer
    x = 103,195.36

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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.