Home / 109,836.80-164,390.70-79,765.55

Finding the Fourth Proportional to 109,836.80, 164,390.70 and 79,765.55

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Solution

The fourth proportional to 109,836.80, 164,390.70 and 79,765.55 is: 119,383.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,836.80 : 164,390.70 = 79,765.55 : x
  2. Step 2: Convert to fraction form
    109,836.80/164,390.70 = 79,765.55/x
  3. Step 3: Cross multiply
    109,836.80x = 164,390.70 × 79,765.55
  4. Step 4: Simplify right side
    109,836.80x = 13,112,714,600.39
  5. Step 5: Solve for x
    x = 13,112,714,600.39/109,836.80
  6. Step 6: Final answer
    x = 119,383.62

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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.