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Finding the Fourth Proportional to 135,722.54, 187,174.40 and 84,739.88

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Solution

The fourth proportional to 135,722.54, 187,174.40 and 84,739.88 is: 116,864.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,722.54 : 187,174.40 = 84,739.88 : x
  2. Step 2: Convert to fraction form
    135,722.54/187,174.40 = 84,739.88/x
  3. Step 3: Cross multiply
    135,722.54x = 187,174.40 × 84,739.88
  4. Step 4: Simplify right side
    135,722.54x = 15,861,136,195.07
  5. Step 5: Solve for x
    x = 15,861,136,195.07/135,722.54
  6. Step 6: Final answer
    x = 116,864.42

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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.