Home / 136,742.05-188,721.21-79,369.03

Finding the Fourth Proportional to 136,742.05, 188,721.21 and 79,369.03

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Solution

The fourth proportional to 136,742.05, 188,721.21 and 79,369.03 is: 109,539.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,742.05 : 188,721.21 = 79,369.03 : x
  2. Step 2: Convert to fraction form
    136,742.05/188,721.21 = 79,369.03/x
  3. Step 3: Cross multiply
    136,742.05x = 188,721.21 × 79,369.03
  4. Step 4: Simplify right side
    136,742.05x = 14,978,619,378.13
  5. Step 5: Solve for x
    x = 14,978,619,378.13/136,742.05
  6. Step 6: Final answer
    x = 109,539.23

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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.