Home / 80,840.10-121,251.60-21,681.75

Finding the Fourth Proportional to 80,840.10, 121,251.60 and 21,681.75

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Solution

The fourth proportional to 80,840.10, 121,251.60 and 21,681.75 is: 32,520.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,840.10 : 121,251.60 = 21,681.75 : x
  2. Step 2: Convert to fraction form
    80,840.10/121,251.60 = 21,681.75/x
  3. Step 3: Cross multiply
    80,840.10x = 121,251.60 × 21,681.75
  4. Step 4: Simplify right side
    80,840.10x = 2,628,946,878.30
  5. Step 5: Solve for x
    x = 2,628,946,878.30/80,840.10
  6. Step 6: Final answer
    x = 32,520.33

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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.