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Finding the Fourth Proportional to 80,855.80, 121,283.70 and 72,302.20

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Solution

The fourth proportional to 80,855.80, 121,283.70 and 72,302.20 is: 108,453.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,855.80 : 121,283.70 = 72,302.20 : x
  2. Step 2: Convert to fraction form
    80,855.80/121,283.70 = 72,302.20/x
  3. Step 3: Cross multiply
    80,855.80x = 121,283.70 × 72,302.20
  4. Step 4: Simplify right side
    80,855.80x = 8,769,078,334.14
  5. Step 5: Solve for x
    x = 8,769,078,334.14/80,855.80
  6. Step 6: Final answer
    x = 108,453.30

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1.5x scale

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.