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Finding the Fourth Proportional to 137,699.90, 206,286.60 and 93,107.78

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Solution

The fourth proportional to 137,699.90, 206,286.60 and 93,107.78 is: 139,483.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,699.90 : 206,286.60 = 93,107.78 : x
  2. Step 2: Convert to fraction form
    137,699.90/206,286.60 = 93,107.78/x
  3. Step 3: Cross multiply
    137,699.90x = 206,286.60 × 93,107.78
  4. Step 4: Simplify right side
    137,699.90x = 19,206,887,369.75
  5. Step 5: Solve for x
    x = 19,206,887,369.75/137,699.90
  6. Step 6: Final answer
    x = 139,483.67

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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.