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Finding the Fourth Proportional to 139,748.68, 209,590.62 and 39,906.28

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Solution

The fourth proportional to 139,748.68, 209,590.62 and 39,906.28 is: 59,850.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,748.68 : 209,590.62 = 39,906.28 : x
  2. Step 2: Convert to fraction form
    139,748.68/209,590.62 = 39,906.28/x
  3. Step 3: Cross multiply
    139,748.68x = 209,590.62 × 39,906.28
  4. Step 4: Simplify right side
    139,748.68x = 8,363,981,967.09
  5. Step 5: Solve for x
    x = 8,363,981,967.09/139,748.68
  6. Step 6: Final answer
    x = 59,850.17

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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.