Home / 136,721.15-188,714.79-79,373.34

Finding the Fourth Proportional to 136,721.15, 188,714.79 and 79,373.34

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Solution

The fourth proportional to 136,721.15, 188,714.79 and 79,373.34 is: 109,558.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,721.15 : 188,714.79 = 79,373.34 : x
  2. Step 2: Convert to fraction form
    136,721.15/188,714.79 = 79,373.34/x
  3. Step 3: Cross multiply
    136,721.15x = 188,714.79 × 79,373.34
  4. Step 4: Simplify right side
    136,721.15x = 14,978,923,189.70
  5. Step 5: Solve for x
    x = 14,978,923,189.70/136,721.15
  6. Step 6: Final answer
    x = 109,558.20

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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.