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Finding the Fourth Proportional to 272,255.44, 408,635.88 and 139,230.76

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Solution

The fourth proportional to 272,255.44, 408,635.88 and 139,230.76 is: 208,975.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,255.44 : 408,635.88 = 139,230.76 : x
  2. Step 2: Convert to fraction form
    272,255.44/408,635.88 = 139,230.76/x
  3. Step 3: Cross multiply
    272,255.44x = 408,635.88 × 139,230.76
  4. Step 4: Simplify right side
    272,255.44x = 56,894,684,135.67
  5. Step 5: Solve for x
    x = 56,894,684,135.67/272,255.44
  6. Step 6: Final answer
    x = 208,975.38

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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.