Home / 80,212.90-120,316.80-38,123.26

Finding the Fourth Proportional to 80,212.90, 120,316.80 and 38,123.26

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Solution

The fourth proportional to 80,212.90, 120,316.80 and 38,123.26 is: 57,183.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,212.90 : 120,316.80 = 38,123.26 : x
  2. Step 2: Convert to fraction form
    80,212.90/120,316.80 = 38,123.26/x
  3. Step 3: Cross multiply
    80,212.90x = 120,316.80 × 38,123.26
  4. Step 4: Simplify right side
    80,212.90x = 4,586,868,648.77
  5. Step 5: Solve for x
    x = 4,586,868,648.77/80,212.90
  6. Step 6: Final answer
    x = 57,183.68

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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.