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Finding the Fourth Proportional to 272,261.90, 408,064.80 and 139,073.60

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Solution

The fourth proportional to 272,261.90, 408,064.80 and 139,073.60 is: 208,442.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,261.90 : 408,064.80 = 139,073.60 : x
  2. Step 2: Convert to fraction form
    272,261.90/408,064.80 = 139,073.60/x
  3. Step 3: Cross multiply
    272,261.90x = 408,064.80 × 139,073.60
  4. Step 4: Simplify right side
    272,261.90x = 56,751,040,769.28
  5. Step 5: Solve for x
    x = 56,751,040,769.28/272,261.90
  6. Step 6: Final answer
    x = 208,442.83

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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.