Home / 135,714.03-187,281.73-78,351.42

Finding the Fourth Proportional to 135,714.03, 187,281.73 and 78,351.42

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Solution

The fourth proportional to 135,714.03, 187,281.73 and 78,351.42 is: 108,122.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,714.03 : 187,281.73 = 78,351.42 : x
  2. Step 2: Convert to fraction form
    135,714.03/187,281.73 = 78,351.42/x
  3. Step 3: Cross multiply
    135,714.03x = 187,281.73 × 78,351.42
  4. Step 4: Simplify right side
    135,714.03x = 14,673,789,485.56
  5. Step 5: Solve for x
    x = 14,673,789,485.56/135,714.03
  6. Step 6: Final answer
    x = 108,122.86

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1.5x scale

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.