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Finding the Fourth Proportional to 139,186.96, 208,780.44 and 40,690.96

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Solution

The fourth proportional to 139,186.96, 208,780.44 and 40,690.96 is: 61,036.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,186.96 : 208,780.44 = 40,690.96 : x
  2. Step 2: Convert to fraction form
    139,186.96/208,780.44 = 40,690.96/x
  3. Step 3: Cross multiply
    139,186.96x = 208,780.44 × 40,690.96
  4. Step 4: Simplify right side
    139,186.96x = 8,495,476,532.82
  5. Step 5: Solve for x
    x = 8,495,476,532.82/139,186.96
  6. Step 6: Final answer
    x = 61,036.44

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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.