Home / 80,855.60-121,240.20-28,266.80

Finding the Fourth Proportional to 80,855.60, 121,240.20 and 28,266.80

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Solution

The fourth proportional to 80,855.60, 121,240.20 and 28,266.80 is: 42,385.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,855.60 : 121,240.20 = 28,266.80 : x
  2. Step 2: Convert to fraction form
    80,855.60/121,240.20 = 28,266.80/x
  3. Step 3: Cross multiply
    80,855.60x = 121,240.20 × 28,266.80
  4. Step 4: Simplify right side
    80,855.60x = 3,427,072,485.36
  5. Step 5: Solve for x
    x = 3,427,072,485.36/80,855.60
  6. Step 6: Final answer
    x = 42,385.10

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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.