Home / 78,129.36-117,236.16-51,846.48

Finding the Fourth Proportional to 78,129.36, 117,236.16 and 51,846.48

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Solution

The fourth proportional to 78,129.36, 117,236.16 and 51,846.48 is: 77,797.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,129.36 : 117,236.16 = 51,846.48 : x
  2. Step 2: Convert to fraction form
    78,129.36/117,236.16 = 51,846.48/x
  3. Step 3: Cross multiply
    78,129.36x = 117,236.16 × 51,846.48
  4. Step 4: Simplify right side
    78,129.36x = 6,078,282,224.72
  5. Step 5: Solve for x
    x = 6,078,282,224.72/78,129.36
  6. Step 6: Final answer
    x = 77,797.67

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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.