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Finding the Fourth Proportional to 80,455.20, 120,682.80 and 59,719.20

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Solution

The fourth proportional to 80,455.20, 120,682.80 and 59,719.20 is: 89,578.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,455.20 : 120,682.80 = 59,719.20 : x
  2. Step 2: Convert to fraction form
    80,455.20/120,682.80 = 59,719.20/x
  3. Step 3: Cross multiply
    80,455.20x = 120,682.80 × 59,719.20
  4. Step 4: Simplify right side
    80,455.20x = 7,207,080,269.76
  5. Step 5: Solve for x
    x = 7,207,080,269.76/80,455.20
  6. Step 6: Final answer
    x = 89,578.80

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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.