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Finding the Fourth Proportional to 236,822.80, 355,115.16 and 78,996.88

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Solution

The fourth proportional to 236,822.80, 355,115.16 and 78,996.88 is: 118,455.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,822.80 : 355,115.16 = 78,996.88 : x
  2. Step 2: Convert to fraction form
    236,822.80/355,115.16 = 78,996.88/x
  3. Step 3: Cross multiply
    236,822.80x = 355,115.16 × 78,996.88
  4. Step 4: Simplify right side
    236,822.80x = 28,052,989,680.70
  5. Step 5: Solve for x
    x = 28,052,989,680.70/236,822.80
  6. Step 6: Final answer
    x = 118,455.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.