Home / 138,581.75-191,242.80-74,919.54

Finding the Fourth Proportional to 138,581.75, 191,242.80 and 74,919.54

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Solution

The fourth proportional to 138,581.75, 191,242.80 and 74,919.54 is: 103,388.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,581.75 : 191,242.80 = 74,919.54 : x
  2. Step 2: Convert to fraction form
    138,581.75/191,242.80 = 74,919.54/x
  3. Step 3: Cross multiply
    138,581.75x = 191,242.80 × 74,919.54
  4. Step 4: Simplify right side
    138,581.75x = 14,327,822,604.31
  5. Step 5: Solve for x
    x = 14,327,822,604.31/138,581.75
  6. Step 6: Final answer
    x = 103,388.96

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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.