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Finding the Fourth Proportional to 208,978.80, 313,602.60 and 115,551.60

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Solution

The fourth proportional to 208,978.80, 313,602.60 and 115,551.60 is: 173,401.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,978.80 : 313,602.60 = 115,551.60 : x
  2. Step 2: Convert to fraction form
    208,978.80/313,602.60 = 115,551.60/x
  3. Step 3: Cross multiply
    208,978.80x = 313,602.60 × 115,551.60
  4. Step 4: Simplify right side
    208,978.80x = 36,237,282,194.16
  5. Step 5: Solve for x
    x = 36,237,282,194.16/208,978.80
  6. Step 6: Final answer
    x = 173,401.71

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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.