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Finding the Fourth Proportional to 139,118.76, 208,690.65 and 39,279.96

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Solution

The fourth proportional to 139,118.76, 208,690.65 and 39,279.96 is: 58,923.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,118.76 : 208,690.65 = 39,279.96 : x
  2. Step 2: Convert to fraction form
    139,118.76/208,690.65 = 39,279.96/x
  3. Step 3: Cross multiply
    139,118.76x = 208,690.65 × 39,279.96
  4. Step 4: Simplify right side
    139,118.76x = 8,197,360,384.37
  5. Step 5: Solve for x
    x = 8,197,360,384.37/139,118.76
  6. Step 6: Final answer
    x = 58,923.47

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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.