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Finding the Fourth Proportional to 139,712.30, 209,568.45 and 50,936.30

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Solution

The fourth proportional to 139,712.30, 209,568.45 and 50,936.30 is: 76,404.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,712.30 : 209,568.45 = 50,936.30 : x
  2. Step 2: Convert to fraction form
    139,712.30/209,568.45 = 50,936.30/x
  3. Step 3: Cross multiply
    139,712.30x = 209,568.45 × 50,936.30
  4. Step 4: Simplify right side
    139,712.30x = 10,674,641,439.74
  5. Step 5: Solve for x
    x = 10,674,641,439.74/139,712.30
  6. Step 6: Final answer
    x = 76,404.45

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1.5x scale

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.