Home / 80,621.46-120,322.53-78,521.94

Finding the Fourth Proportional to 80,621.46, 120,322.53 and 78,521.94

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Solution

The fourth proportional to 80,621.46, 120,322.53 and 78,521.94 is: 117,189.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,621.46 : 120,322.53 = 78,521.94 : x
  2. Step 2: Convert to fraction form
    80,621.46/120,322.53 = 78,521.94/x
  3. Step 3: Cross multiply
    80,621.46x = 120,322.53 × 78,521.94
  4. Step 4: Simplify right side
    80,621.46x = 9,447,958,481.31
  5. Step 5: Solve for x
    x = 9,447,958,481.31/80,621.46
  6. Step 6: Final answer
    x = 117,189.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.