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Finding the Fourth Proportional to 139,110.18, 208,662.03 and 75,991.74

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Solution

The fourth proportional to 139,110.18, 208,662.03 and 75,991.74 is: 113,985.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,110.18 : 208,662.03 = 75,991.74 : x
  2. Step 2: Convert to fraction form
    139,110.18/208,662.03 = 75,991.74/x
  3. Step 3: Cross multiply
    139,110.18x = 208,662.03 × 75,991.74
  4. Step 4: Simplify right side
    139,110.18x = 15,856,590,731.63
  5. Step 5: Solve for x
    x = 15,856,590,731.63/139,110.18
  6. Step 6: Final answer
    x = 113,985.84

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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.