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Finding the Fourth Proportional to 139,690.71, 209,536.07 and 34,511.67

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Solution

The fourth proportional to 139,690.71, 209,536.07 and 34,511.67 is: 51,767.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,690.71 : 209,536.07 = 34,511.67 : x
  2. Step 2: Convert to fraction form
    139,690.71/209,536.07 = 34,511.67/x
  3. Step 3: Cross multiply
    139,690.71x = 209,536.07 × 34,511.67
  4. Step 4: Simplify right side
    139,690.71x = 7,231,439,528.38
  5. Step 5: Solve for x
    x = 7,231,439,528.38/139,690.71
  6. Step 6: Final answer
    x = 51,767.51

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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.