Home / 78,379.92-117,577.44-25,776.72

Finding the Fourth Proportional to 78,379.92, 117,577.44 and 25,776.72

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Solution

The fourth proportional to 78,379.92, 117,577.44 and 25,776.72 is: 38,667.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,379.92 : 117,577.44 = 25,776.72 : x
  2. Step 2: Convert to fraction form
    78,379.92/117,577.44 = 25,776.72/x
  3. Step 3: Cross multiply
    78,379.92x = 117,577.44 × 25,776.72
  4. Step 4: Simplify right side
    78,379.92x = 3,030,760,749.20
  5. Step 5: Solve for x
    x = 3,030,760,749.20/78,379.92
  6. Step 6: Final answer
    x = 38,667.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.