Home / 138,749.82-191,483.37-78,298.41

Finding the Fourth Proportional to 138,749.82, 191,483.37 and 78,298.41

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Solution

The fourth proportional to 138,749.82, 191,483.37 and 78,298.41 is: 108,056.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,749.82 : 191,483.37 = 78,298.41 : x
  2. Step 2: Convert to fraction form
    138,749.82/191,483.37 = 78,298.41/x
  3. Step 3: Cross multiply
    138,749.82x = 191,483.37 × 78,298.41
  4. Step 4: Simplify right side
    138,749.82x = 14,992,843,412.44
  5. Step 5: Solve for x
    x = 14,992,843,412.44/138,749.82
  6. Step 6: Final answer
    x = 108,056.67

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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.