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Finding the Fourth Proportional to 272,040.70, 408,061.05 and 139,180.45

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Solution

The fourth proportional to 272,040.70, 408,061.05 and 139,180.45 is: 208,770.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,040.70 : 408,061.05 = 139,180.45 : x
  2. Step 2: Convert to fraction form
    272,040.70/408,061.05 = 139,180.45/x
  3. Step 3: Cross multiply
    272,040.70x = 408,061.05 × 139,180.45
  4. Step 4: Simplify right side
    272,040.70x = 56,794,120,566.47
  5. Step 5: Solve for x
    x = 56,794,120,566.47/272,040.70
  6. Step 6: Final answer
    x = 208,770.68

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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.