Home / 120,815.19-166,531.08-82,040.85

Finding the Fourth Proportional to 120,815.19, 166,531.08 and 82,040.85

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Solution

The fourth proportional to 120,815.19, 166,531.08 and 82,040.85 is: 113,084.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,815.19 : 166,531.08 = 82,040.85 : x
  2. Step 2: Convert to fraction form
    120,815.19/166,531.08 = 82,040.85/x
  3. Step 3: Cross multiply
    120,815.19x = 166,531.08 × 82,040.85
  4. Step 4: Simplify right side
    120,815.19x = 13,662,351,354.62
  5. Step 5: Solve for x
    x = 13,662,351,354.62/120,815.19
  6. Step 6: Final answer
    x = 113,084.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.