Home / 257,183.23-385,633.90-79,640.95

Finding the Fourth Proportional to 257,183.23, 385,633.90 and 79,640.95

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Solution

The fourth proportional to 257,183.23, 385,633.90 and 79,640.95 is: 119,417.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,183.23 : 385,633.90 = 79,640.95 : x
  2. Step 2: Convert to fraction form
    257,183.23/385,633.90 = 79,640.95/x
  3. Step 3: Cross multiply
    257,183.23x = 385,633.90 × 79,640.95
  4. Step 4: Simplify right side
    257,183.23x = 30,712,250,148.21
  5. Step 5: Solve for x
    x = 30,712,250,148.21/257,183.23
  6. Step 6: Final answer
    x = 119,417.78

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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.