Home / 120,393.12-166,087.36-77,965.32

Finding the Fourth Proportional to 120,393.12, 166,087.36 and 77,965.32

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Solution

The fourth proportional to 120,393.12, 166,087.36 and 77,965.32 is: 107,556.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,393.12 : 166,087.36 = 77,965.32 : x
  2. Step 2: Convert to fraction form
    120,393.12/166,087.36 = 77,965.32/x
  3. Step 3: Cross multiply
    120,393.12x = 166,087.36 × 77,965.32
  4. Step 4: Simplify right side
    120,393.12x = 12,949,054,170.36
  5. Step 5: Solve for x
    x = 12,949,054,170.36/120,393.12
  6. Step 6: Final answer
    x = 107,556.43

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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.