Home / 80,850.40-121,281.90-21,685.48

Finding the Fourth Proportional to 80,850.40, 121,281.90 and 21,685.48

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Solution

The fourth proportional to 80,850.40, 121,281.90 and 21,685.48 is: 32,529.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,850.40 : 121,281.90 = 21,685.48 : x
  2. Step 2: Convert to fraction form
    80,850.40/121,281.90 = 21,685.48/x
  3. Step 3: Cross multiply
    80,850.40x = 121,281.90 × 21,685.48
  4. Step 4: Simplify right side
    80,850.40x = 2,630,056,216.81
  5. Step 5: Solve for x
    x = 2,630,056,216.81/80,850.40
  6. Step 6: Final answer
    x = 32,529.91

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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.