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Finding the Fourth Proportional to 272,247.88, 408,454.90 and 139,221.58

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Solution

The fourth proportional to 272,247.88, 408,454.90 and 139,221.58 is: 208,874.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,247.88 : 408,454.90 = 139,221.58 : x
  2. Step 2: Convert to fraction form
    272,247.88/408,454.90 = 139,221.58/x
  3. Step 3: Cross multiply
    272,247.88x = 408,454.90 × 139,221.58
  4. Step 4: Simplify right side
    272,247.88x = 56,865,736,536.74
  5. Step 5: Solve for x
    x = 56,865,736,536.74/272,247.88
  6. Step 6: Final answer
    x = 208,874.86

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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.