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Finding the Fourth Proportional to 98,349.42, 135,609.87 and 80,836.41

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Solution

The fourth proportional to 98,349.42, 135,609.87 and 80,836.41 is: 111,461.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,349.42 : 135,609.87 = 80,836.41 : x
  2. Step 2: Convert to fraction form
    98,349.42/135,609.87 = 80,836.41/x
  3. Step 3: Cross multiply
    98,349.42x = 135,609.87 × 80,836.41
  4. Step 4: Simplify right side
    98,349.42x = 10,962,215,051.37
  5. Step 5: Solve for x
    x = 10,962,215,051.37/98,349.42
  6. Step 6: Final answer
    x = 111,461.92

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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.