Home / 138,581.56-191,243.10-74,919.88

Finding the Fourth Proportional to 138,581.56, 191,243.10 and 74,919.88

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Solution

The fourth proportional to 138,581.56, 191,243.10 and 74,919.88 is: 103,389.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,581.56 : 191,243.10 = 74,919.88 : x
  2. Step 2: Convert to fraction form
    138,581.56/191,243.10 = 74,919.88/x
  3. Step 3: Cross multiply
    138,581.56x = 191,243.10 × 74,919.88
  4. Step 4: Simplify right side
    138,581.56x = 14,327,910,102.83
  5. Step 5: Solve for x
    x = 14,327,910,102.83/138,581.56
  6. Step 6: Final answer
    x = 103,389.73

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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.