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Finding the Fourth Proportional to 272,190.84, 408,407.76 and 139,000.92

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Solution

The fourth proportional to 272,190.84, 408,407.76 and 139,000.92 is: 208,563.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,190.84 : 408,407.76 = 139,000.92 : x
  2. Step 2: Convert to fraction form
    272,190.84/408,407.76 = 139,000.92/x
  3. Step 3: Cross multiply
    272,190.84x = 408,407.76 × 139,000.92
  4. Step 4: Simplify right side
    272,190.84x = 56,769,054,375.14
  5. Step 5: Solve for x
    x = 56,769,054,375.14/272,190.84
  6. Step 6: Final answer
    x = 208,563.43

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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.