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Finding the Fourth Proportional to 98,161.32, 135,469.62 and 55,722.63

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Solution

The fourth proportional to 98,161.32, 135,469.62 and 55,722.63 is: 76,901.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,161.32 : 135,469.62 = 55,722.63 : x
  2. Step 2: Convert to fraction form
    98,161.32/135,469.62 = 55,722.63/x
  3. Step 3: Cross multiply
    98,161.32x = 135,469.62 × 55,722.63
  4. Step 4: Simplify right side
    98,161.32x = 7,548,723,511.50
  5. Step 5: Solve for x
    x = 7,548,723,511.50/98,161.32
  6. Step 6: Final answer
    x = 76,901.20

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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.