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Finding the Fourth Proportional to 84,288.64, 126,564.48 and 80,549.44

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Solution

The fourth proportional to 84,288.64, 126,564.48 and 80,549.44 is: 120,949.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,288.64 : 126,564.48 = 80,549.44 : x
  2. Step 2: Convert to fraction form
    84,288.64/126,564.48 = 80,549.44/x
  3. Step 3: Cross multiply
    84,288.64x = 126,564.48 × 80,549.44
  4. Step 4: Simplify right side
    84,288.64x = 10,194,697,987.89
  5. Step 5: Solve for x
    x = 10,194,697,987.89/84,288.64
  6. Step 6: Final answer
    x = 120,949.85

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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.