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Finding the Fourth Proportional to 139,906.59, 193,065.48 and 76,243.02

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Solution

The fourth proportional to 139,906.59, 193,065.48 and 76,243.02 is: 105,212.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,906.59 : 193,065.48 = 76,243.02 : x
  2. Step 2: Convert to fraction form
    139,906.59/193,065.48 = 76,243.02/x
  3. Step 3: Cross multiply
    139,906.59x = 193,065.48 × 76,243.02
  4. Step 4: Simplify right side
    139,906.59x = 14,719,895,252.95
  5. Step 5: Solve for x
    x = 14,719,895,252.95/139,906.59
  6. Step 6: Final answer
    x = 105,212.31

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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.