Home / 135,986.84-187,608.10-78,615.60

Finding the Fourth Proportional to 135,986.84, 187,608.10 and 78,615.60

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Solution

The fourth proportional to 135,986.84, 187,608.10 and 78,615.60 is: 108,458.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,986.84 : 187,608.10 = 78,615.60 : x
  2. Step 2: Convert to fraction form
    135,986.84/187,608.10 = 78,615.60/x
  3. Step 3: Cross multiply
    135,986.84x = 187,608.10 × 78,615.60
  4. Step 4: Simplify right side
    135,986.84x = 14,748,923,346.36
  5. Step 5: Solve for x
    x = 14,748,923,346.36/135,986.84
  6. Step 6: Final answer
    x = 108,458.46

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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.