Home / 147,138.90-203,049.78-86,712.09

Finding the Fourth Proportional to 147,138.90, 203,049.78 and 86,712.09

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Solution

The fourth proportional to 147,138.90, 203,049.78 and 86,712.09 is: 119,661.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,138.90 : 203,049.78 = 86,712.09 : x
  2. Step 2: Convert to fraction form
    147,138.90/203,049.78 = 86,712.09/x
  3. Step 3: Cross multiply
    147,138.90x = 203,049.78 × 86,712.09
  4. Step 4: Simplify right side
    147,138.90x = 17,606,870,797.84
  5. Step 5: Solve for x
    x = 17,606,870,797.84/147,138.90
  6. Step 6: Final answer
    x = 119,661.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.