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Finding the Fourth Proportional to 80,991.60, 122,104.12 and 75,283.48

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Solution

The fourth proportional to 80,991.60, 122,104.12 and 75,283.48 is: 113,498.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,991.60 : 122,104.12 = 75,283.48 : x
  2. Step 2: Convert to fraction form
    80,991.60/122,104.12 = 75,283.48/x
  3. Step 3: Cross multiply
    80,991.60x = 122,104.12 × 75,283.48
  4. Step 4: Simplify right side
    80,991.60x = 9,192,423,075.94
  5. Step 5: Solve for x
    x = 9,192,423,075.94/80,991.60
  6. Step 6: Final answer
    x = 113,498.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.