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Finding the Fourth Proportional to 256,950.09, 385,461.99 and 79,470.86

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Solution

The fourth proportional to 256,950.09, 385,461.99 and 79,470.86 is: 119,217.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,950.09 : 385,461.99 = 79,470.86 : x
  2. Step 2: Convert to fraction form
    256,950.09/385,461.99 = 79,470.86/x
  3. Step 3: Cross multiply
    256,950.09x = 385,461.99 × 79,470.86
  4. Step 4: Simplify right side
    256,950.09x = 30,632,993,915.30
  5. Step 5: Solve for x
    x = 30,632,993,915.30/256,950.09
  6. Step 6: Final answer
    x = 119,217.68

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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.