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Finding the Fourth Proportional to 80,328.84, 110,755.26 and 65,178.60

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Solution

The fourth proportional to 80,328.84, 110,755.26 and 65,178.60 is: 89,866.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,328.84 : 110,755.26 = 65,178.60 : x
  2. Step 2: Convert to fraction form
    80,328.84/110,755.26 = 65,178.60/x
  3. Step 3: Cross multiply
    80,328.84x = 110,755.26 × 65,178.60
  4. Step 4: Simplify right side
    80,328.84x = 7,218,872,789.44
  5. Step 5: Solve for x
    x = 7,218,872,789.44/80,328.84
  6. Step 6: Final answer
    x = 89,866.51

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1.5x scale

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.