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Finding the Fourth Proportional to 80,555.79, 120,832.40 and 19,766.71

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Solution

The fourth proportional to 80,555.79, 120,832.40 and 19,766.71 is: 29,649.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,555.79 : 120,832.40 = 19,766.71 : x
  2. Step 2: Convert to fraction form
    80,555.79/120,832.40 = 19,766.71/x
  3. Step 3: Cross multiply
    80,555.79x = 120,832.40 × 19,766.71
  4. Step 4: Simplify right side
    80,555.79x = 2,388,458,756.74
  5. Step 5: Solve for x
    x = 2,388,458,756.74/80,555.79
  6. Step 6: Final answer
    x = 29,649.75

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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.