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Finding the Fourth Proportional to 80,429.85, 120,621.27 and 30,473.91

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Solution

The fourth proportional to 80,429.85, 120,621.27 and 30,473.91 is: 45,701.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,429.85 : 120,621.27 = 30,473.91 : x
  2. Step 2: Convert to fraction form
    80,429.85/120,621.27 = 30,473.91/x
  3. Step 3: Cross multiply
    80,429.85x = 120,621.27 × 30,473.91
  4. Step 4: Simplify right side
    80,429.85x = 3,675,801,726.07
  5. Step 5: Solve for x
    x = 3,675,801,726.07/80,429.85
  6. Step 6: Final answer
    x = 45,701.96

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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.