Home / 81,668.85-122,445.36-31,706.84

Finding the Fourth Proportional to 81,668.85, 122,445.36 and 31,706.84

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Solution

The fourth proportional to 81,668.85, 122,445.36 and 31,706.84 is: 47,537.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,668.85 : 122,445.36 = 31,706.84 : x
  2. Step 2: Convert to fraction form
    81,668.85/122,445.36 = 31,706.84/x
  3. Step 3: Cross multiply
    81,668.85x = 122,445.36 × 31,706.84
  4. Step 4: Simplify right side
    81,668.85x = 3,882,354,826.04
  5. Step 5: Solve for x
    x = 3,882,354,826.04/81,668.85
  6. Step 6: Final answer
    x = 47,537.77

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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.