Home / 78,002.32-117,015.96-25,407.76

Finding the Fourth Proportional to 78,002.32, 117,015.96 and 25,407.76

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Solution

The fourth proportional to 78,002.32, 117,015.96 and 25,407.76 is: 38,115.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,002.32 : 117,015.96 = 25,407.76 : x
  2. Step 2: Convert to fraction form
    78,002.32/117,015.96 = 25,407.76/x
  3. Step 3: Cross multiply
    78,002.32x = 117,015.96 × 25,407.76
  4. Step 4: Simplify right side
    78,002.32x = 2,973,113,427.85
  5. Step 5: Solve for x
    x = 2,973,113,427.85/78,002.32
  6. Step 6: Final answer
    x = 38,115.71

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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.