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Finding the Fourth Proportional to 139,910.76, 193,071.96 and 76,247.28

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Solution

The fourth proportional to 139,910.76, 193,071.96 and 76,247.28 is: 105,218.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,910.76 : 193,071.96 = 76,247.28 : x
  2. Step 2: Convert to fraction form
    139,910.76/193,071.96 = 76,247.28/x
  3. Step 3: Cross multiply
    139,910.76x = 193,071.96 × 76,247.28
  4. Step 4: Simplify right side
    139,910.76x = 14,721,211,794.27
  5. Step 5: Solve for x
    x = 14,721,211,794.27/139,910.76
  6. Step 6: Final answer
    x = 105,218.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.