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Finding the Fourth Proportional to 139,862.74, 193,010.60 and 76,200.54

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Solution

The fourth proportional to 139,862.74, 193,010.60 and 76,200.54 is: 105,156.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,862.74 : 193,010.60 = 76,200.54 : x
  2. Step 2: Convert to fraction form
    139,862.74/193,010.60 = 76,200.54/x
  3. Step 3: Cross multiply
    139,862.74x = 193,010.60 × 76,200.54
  4. Step 4: Simplify right side
    139,862.74x = 14,707,511,945.72
  5. Step 5: Solve for x
    x = 14,707,511,945.72/139,862.74
  6. Step 6: Final answer
    x = 105,156.76

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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.