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Finding the Fourth Proportional to 101,910.90, 140,538.06 and 79,209.84

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Solution

The fourth proportional to 101,910.90, 140,538.06 and 79,209.84 is: 109,232.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,910.90 : 140,538.06 = 79,209.84 : x
  2. Step 2: Convert to fraction form
    101,910.90/140,538.06 = 79,209.84/x
  3. Step 3: Cross multiply
    101,910.90x = 140,538.06 × 79,209.84
  4. Step 4: Simplify right side
    101,910.90x = 11,131,997,246.51
  5. Step 5: Solve for x
    x = 11,131,997,246.51/101,910.90
  6. Step 6: Final answer
    x = 109,232.65

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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.