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Finding the Fourth Proportional to 139,518.97, 192,538.65 and 75,857.22

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Solution

The fourth proportional to 139,518.97, 192,538.65 and 75,857.22 is: 104,684.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,518.97 : 192,538.65 = 75,857.22 : x
  2. Step 2: Convert to fraction form
    139,518.97/192,538.65 = 75,857.22/x
  3. Step 3: Cross multiply
    139,518.97x = 192,538.65 × 75,857.22
  4. Step 4: Simplify right side
    139,518.97x = 14,605,447,016.02
  5. Step 5: Solve for x
    x = 14,605,447,016.02/139,518.97
  6. Step 6: Final answer
    x = 104,684.31

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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.