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Finding the Fourth Proportional to 136,820.33, 188,797.68 and 79,448.43

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Solution

The fourth proportional to 136,820.33, 188,797.68 and 79,448.43 is: 109,630.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,820.33 : 188,797.68 = 79,448.43 : x
  2. Step 2: Convert to fraction form
    136,820.33/188,797.68 = 79,448.43/x
  3. Step 3: Cross multiply
    136,820.33x = 188,797.68 × 79,448.43
  4. Step 4: Simplify right side
    136,820.33x = 14,999,679,263.64
  5. Step 5: Solve for x
    x = 14,999,679,263.64/136,820.33
  6. Step 6: Final answer
    x = 109,630.49

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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.