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Finding the Fourth Proportional to 139,912.60, 193,073.76 and 76,249.02

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Solution

The fourth proportional to 139,912.60, 193,073.76 and 76,249.02 is: 105,220.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,912.60 : 193,073.76 = 76,249.02 : x
  2. Step 2: Convert to fraction form
    139,912.60/193,073.76 = 76,249.02/x
  3. Step 3: Cross multiply
    139,912.60x = 193,073.76 × 76,249.02
  4. Step 4: Simplify right side
    139,912.60x = 14,721,684,987.72
  5. Step 5: Solve for x
    x = 14,721,684,987.72/139,912.60
  6. Step 6: Final answer
    x = 105,220.58

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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.