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Finding the Fourth Proportional to 139,703.47, 209,428.83 and 50,936.20

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Solution

The fourth proportional to 139,703.47, 209,428.83 and 50,936.20 is: 76,358.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,703.47 : 209,428.83 = 50,936.20 : x
  2. Step 2: Convert to fraction form
    139,703.47/209,428.83 = 50,936.20/x
  3. Step 3: Cross multiply
    139,703.47x = 209,428.83 × 50,936.20
  4. Step 4: Simplify right side
    139,703.47x = 10,667,508,247.07
  5. Step 5: Solve for x
    x = 10,667,508,247.07/139,703.47
  6. Step 6: Final answer
    x = 76,358.22

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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.