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Finding the Fourth Proportional to 139,656.81, 209,358.14 and 50,890.08

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Solution

The fourth proportional to 139,656.81, 209,358.14 and 50,890.08 is: 76,288.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,656.81 : 209,358.14 = 50,890.08 : x
  2. Step 2: Convert to fraction form
    139,656.81/209,358.14 = 50,890.08/x
  3. Step 3: Cross multiply
    139,656.81x = 209,358.14 × 50,890.08
  4. Step 4: Simplify right side
    139,656.81x = 10,654,252,238.80
  5. Step 5: Solve for x
    x = 10,654,252,238.80/139,656.81
  6. Step 6: Final answer
    x = 76,288.81

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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.