Home / 78,729.88-108,649.26-45,202.36

Finding the Fourth Proportional to 78,729.88, 108,649.26 and 45,202.36

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Solution

The fourth proportional to 78,729.88, 108,649.26 and 45,202.36 is: 62,380.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,729.88 : 108,649.26 = 45,202.36 : x
  2. Step 2: Convert to fraction form
    78,729.88/108,649.26 = 45,202.36/x
  3. Step 3: Cross multiply
    78,729.88x = 108,649.26 × 45,202.36
  4. Step 4: Simplify right side
    78,729.88x = 4,911,202,964.25
  5. Step 5: Solve for x
    x = 4,911,202,964.25/78,729.88
  6. Step 6: Final answer
    x = 62,380.42

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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.