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Finding the Fourth Proportional to 139,126.60, 208,697.98 and 39,278.43

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Solution

The fourth proportional to 139,126.60, 208,697.98 and 39,278.43 is: 58,919.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,126.60 : 208,697.98 = 39,278.43 : x
  2. Step 2: Convert to fraction form
    139,126.60/208,697.98 = 39,278.43/x
  3. Step 3: Cross multiply
    139,126.60x = 208,697.98 × 39,278.43
  4. Step 4: Simplify right side
    139,126.60x = 8,197,328,998.57
  5. Step 5: Solve for x
    x = 8,197,328,998.57/139,126.60
  6. Step 6: Final answer
    x = 58,919.93

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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.