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Finding the Fourth Proportional to 208,699.79, 313,062.09 and 80,617.04

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Solution

The fourth proportional to 208,699.79, 313,062.09 and 80,617.04 is: 120,930.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,699.79 : 313,062.09 = 80,617.04 : x
  2. Step 2: Convert to fraction form
    208,699.79/313,062.09 = 80,617.04/x
  3. Step 3: Cross multiply
    208,699.79x = 313,062.09 × 80,617.04
  4. Step 4: Simplify right side
    208,699.79x = 25,238,137,466.70
  5. Step 5: Solve for x
    x = 25,238,137,466.70/208,699.79
  6. Step 6: Final answer
    x = 120,930.35

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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.