Home / 135,997.14-187,654.60-78,615.12

Finding the Fourth Proportional to 135,997.14, 187,654.60 and 78,615.12

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Solution

The fourth proportional to 135,997.14, 187,654.60 and 78,615.12 is: 108,476.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,997.14 : 187,654.60 = 78,615.12 : x
  2. Step 2: Convert to fraction form
    135,997.14/187,654.60 = 78,615.12/x
  3. Step 3: Cross multiply
    135,997.14x = 187,654.60 × 78,615.12
  4. Step 4: Simplify right side
    135,997.14x = 14,752,487,762.74
  5. Step 5: Solve for x
    x = 14,752,487,762.74/135,997.14
  6. Step 6: Final answer
    x = 108,476.46

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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.