Home / 80,211.12-120,314.19-38,121.51

Finding the Fourth Proportional to 80,211.12, 120,314.19 and 38,121.51

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Solution

The fourth proportional to 80,211.12, 120,314.19 and 38,121.51 is: 57,181.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,211.12 : 120,314.19 = 38,121.51 : x
  2. Step 2: Convert to fraction form
    80,211.12/120,314.19 = 38,121.51/x
  3. Step 3: Cross multiply
    80,211.12x = 120,314.19 × 38,121.51
  4. Step 4: Simplify right side
    80,211.12x = 4,586,558,597.23
  5. Step 5: Solve for x
    x = 4,586,558,597.23/80,211.12
  6. Step 6: Final answer
    x = 57,181.08

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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.