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Finding the Fourth Proportional to 139,366.40, 208,742.40 and 120,934.40

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Solution

The fourth proportional to 139,366.40, 208,742.40 and 120,934.40 is: 181,135.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,366.40 : 208,742.40 = 120,934.40 : x
  2. Step 2: Convert to fraction form
    139,366.40/208,742.40 = 120,934.40/x
  3. Step 3: Cross multiply
    139,366.40x = 208,742.40 × 120,934.40
  4. Step 4: Simplify right side
    139,366.40x = 25,244,136,898.56
  5. Step 5: Solve for x
    x = 25,244,136,898.56/139,366.40
  6. Step 6: Final answer
    x = 181,135.03

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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.