Home / 138,128.70-207,145.94-53,882.22

Finding the Fourth Proportional to 138,128.70, 207,145.94 and 53,882.22

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Solution

The fourth proportional to 138,128.70, 207,145.94 and 53,882.22 is: 80,804.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,128.70 : 207,145.94 = 53,882.22 : x
  2. Step 2: Convert to fraction form
    138,128.70/207,145.94 = 53,882.22/x
  3. Step 3: Cross multiply
    138,128.70x = 207,145.94 × 53,882.22
  4. Step 4: Simplify right side
    138,128.70x = 11,161,483,111.19
  5. Step 5: Solve for x
    x = 11,161,483,111.19/138,128.70
  6. Step 6: Final answer
    x = 80,804.95

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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.