Home / 257,115.24-385,732.80-79,612.74

Finding the Fourth Proportional to 257,115.24, 385,732.80 and 79,612.74

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Solution

The fourth proportional to 257,115.24, 385,732.80 and 79,612.74 is: 119,437.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,115.24 : 385,732.80 = 79,612.74 : x
  2. Step 2: Convert to fraction form
    257,115.24/385,732.80 = 79,612.74/x
  3. Step 3: Cross multiply
    257,115.24x = 385,732.80 × 79,612.74
  4. Step 4: Simplify right side
    257,115.24x = 30,709,245,115.87
  5. Step 5: Solve for x
    x = 30,709,245,115.87/257,115.24
  6. Step 6: Final answer
    x = 119,437.67

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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.