Home / 218,965.11-328,301.82-78,705.51

Finding the Fourth Proportional to 218,965.11, 328,301.82 and 78,705.51

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Solution

The fourth proportional to 218,965.11, 328,301.82 and 78,705.51 is: 118,005.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,965.11 : 328,301.82 = 78,705.51 : x
  2. Step 2: Convert to fraction form
    218,965.11/328,301.82 = 78,705.51/x
  3. Step 3: Cross multiply
    218,965.11x = 328,301.82 × 78,705.51
  4. Step 4: Simplify right side
    218,965.11x = 25,839,162,177.03
  5. Step 5: Solve for x
    x = 25,839,162,177.03/218,965.11
  6. Step 6: Final answer
    x = 118,005.84

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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.