Home / 78,141.36-117,254.16-51,858.48

Finding the Fourth Proportional to 78,141.36, 117,254.16 and 51,858.48

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Solution

The fourth proportional to 78,141.36, 117,254.16 and 51,858.48 is: 77,815.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,141.36 : 117,254.16 = 51,858.48 : x
  2. Step 2: Convert to fraction form
    78,141.36/117,254.16 = 51,858.48/x
  3. Step 3: Cross multiply
    78,141.36x = 117,254.16 × 51,858.48
  4. Step 4: Simplify right side
    78,141.36x = 6,080,622,511.28
  5. Step 5: Solve for x
    x = 6,080,622,511.28/78,141.36
  6. Step 6: Final answer
    x = 77,815.67

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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.