Home / 80,421.20-120,631.79-55,095.74

Finding the Fourth Proportional to 80,421.20, 120,631.79 and 55,095.74

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Solution

The fourth proportional to 80,421.20, 120,631.79 and 55,095.74 is: 82,643.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,421.20 : 120,631.79 = 55,095.74 : x
  2. Step 2: Convert to fraction form
    80,421.20/120,631.79 = 55,095.74/x
  3. Step 3: Cross multiply
    80,421.20x = 120,631.79 × 55,095.74
  4. Step 4: Simplify right side
    80,421.20x = 6,646,296,858.94
  5. Step 5: Solve for x
    x = 6,646,296,858.94/80,421.20
  6. Step 6: Final answer
    x = 82,643.60

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Similar ratio
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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.