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Finding the Fourth Proportional to 139,761.60, 209,593.96 and 39,894.98

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Solution

The fourth proportional to 139,761.60, 209,593.96 and 39,894.98 is: 59,828.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,761.60 : 209,593.96 = 39,894.98 : x
  2. Step 2: Convert to fraction form
    139,761.60/209,593.96 = 39,894.98/x
  3. Step 3: Cross multiply
    139,761.60x = 209,593.96 × 39,894.98
  4. Step 4: Simplify right side
    139,761.60x = 8,361,747,140.07
  5. Step 5: Solve for x
    x = 8,361,747,140.07/139,761.60
  6. Step 6: Final answer
    x = 59,828.64

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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.