Home / 138,537.29-191,177.64-78,107.41

Finding the Fourth Proportional to 138,537.29, 191,177.64 and 78,107.41

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Solution

The fourth proportional to 138,537.29, 191,177.64 and 78,107.41 is: 107,786.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,537.29 : 191,177.64 = 78,107.41 : x
  2. Step 2: Convert to fraction form
    138,537.29/191,177.64 = 78,107.41/x
  3. Step 3: Cross multiply
    138,537.29x = 191,177.64 × 78,107.41
  4. Step 4: Simplify right side
    138,537.29x = 14,932,389,832.37
  5. Step 5: Solve for x
    x = 14,932,389,832.37/138,537.29
  6. Step 6: Final answer
    x = 107,786.07

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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.