Home / 138,541.43-191,183.33-78,111.53

Finding the Fourth Proportional to 138,541.43, 191,183.33 and 78,111.53

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Solution

The fourth proportional to 138,541.43, 191,183.33 and 78,111.53 is: 107,791.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,541.43 : 191,183.33 = 78,111.53 : x
  2. Step 2: Convert to fraction form
    138,541.43/191,183.33 = 78,111.53/x
  3. Step 3: Cross multiply
    138,541.43x = 191,183.33 × 78,111.53
  4. Step 4: Simplify right side
    138,541.43x = 14,933,623,090.03
  5. Step 5: Solve for x
    x = 14,933,623,090.03/138,541.43
  6. Step 6: Final answer
    x = 107,791.75

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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.