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Finding the Fourth Proportional to 88,780.80, 122,634.24 and 65,857.28

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Solution

The fourth proportional to 88,780.80, 122,634.24 and 65,857.28 is: 90,969.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,780.80 : 122,634.24 = 65,857.28 : x
  2. Step 2: Convert to fraction form
    88,780.80/122,634.24 = 65,857.28/x
  3. Step 3: Cross multiply
    88,780.80x = 122,634.24 × 65,857.28
  4. Step 4: Simplify right side
    88,780.80x = 8,076,357,481.27
  5. Step 5: Solve for x
    x = 8,076,357,481.27/88,780.80
  6. Step 6: Final answer
    x = 90,969.64

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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.