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Finding the Fourth Proportional to 139,792.02, 209,673.45 and 39,945.75

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Solution

The fourth proportional to 139,792.02, 209,673.45 and 39,945.75 is: 59,914.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,792.02 : 209,673.45 = 39,945.75 : x
  2. Step 2: Convert to fraction form
    139,792.02/209,673.45 = 39,945.75/x
  3. Step 3: Cross multiply
    139,792.02x = 209,673.45 × 39,945.75
  4. Step 4: Simplify right side
    139,792.02x = 8,375,563,215.34
  5. Step 5: Solve for x
    x = 8,375,563,215.34/139,792.02
  6. Step 6: Final answer
    x = 59,914.46

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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.