Home / 80,421.46-120,640.39-27,818.64

Finding the Fourth Proportional to 80,421.46, 120,640.39 and 27,818.64

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Solution

The fourth proportional to 80,421.46, 120,640.39 and 27,818.64 is: 41,730.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,421.46 : 120,640.39 = 27,818.64 : x
  2. Step 2: Convert to fraction form
    80,421.46/120,640.39 = 27,818.64/x
  3. Step 3: Cross multiply
    80,421.46x = 120,640.39 × 27,818.64
  4. Step 4: Simplify right side
    80,421.46x = 3,356,051,509.32
  5. Step 5: Solve for x
    x = 3,356,051,509.32/80,421.46
  6. Step 6: Final answer
    x = 41,730.80

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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.