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Finding the Fourth Proportional to 139,719.80, 209,579.70 and 50,943.80

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Solution

The fourth proportional to 139,719.80, 209,579.70 and 50,943.80 is: 76,415.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,719.80 : 209,579.70 = 50,943.80 : x
  2. Step 2: Convert to fraction form
    139,719.80/209,579.70 = 50,943.80/x
  3. Step 3: Cross multiply
    139,719.80x = 209,579.70 × 50,943.80
  4. Step 4: Simplify right side
    139,719.80x = 10,676,786,320.86
  5. Step 5: Solve for x
    x = 10,676,786,320.86/139,719.80
  6. Step 6: Final answer
    x = 76,415.70

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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.