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Finding the Fourth Proportional to 139,500.80, 209,251.20 and 122,004.80

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Solution

The fourth proportional to 139,500.80, 209,251.20 and 122,004.80 is: 183,007.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,500.80 : 209,251.20 = 122,004.80 : x
  2. Step 2: Convert to fraction form
    139,500.80/209,251.20 = 122,004.80/x
  3. Step 3: Cross multiply
    139,500.80x = 209,251.20 × 122,004.80
  4. Step 4: Simplify right side
    139,500.80x = 25,529,650,805.76
  5. Step 5: Solve for x
    x = 25,529,650,805.76/139,500.80
  6. Step 6: Final answer
    x = 183,007.20

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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.