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Finding the Fourth Proportional to 139,842.90, 209,771.46 and 40,017.92

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Solution

The fourth proportional to 139,842.90, 209,771.46 and 40,017.92 is: 60,028.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,842.90 : 209,771.46 = 40,017.92 : x
  2. Step 2: Convert to fraction form
    139,842.90/209,771.46 = 40,017.92/x
  3. Step 3: Cross multiply
    139,842.90x = 209,771.46 × 40,017.92
  4. Step 4: Simplify right side
    139,842.90x = 8,394,616,455.71
  5. Step 5: Solve for x
    x = 8,394,616,455.71/139,842.90
  6. Step 6: Final answer
    x = 60,028.91

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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.