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Finding the Fourth Proportional to 139,729.98, 192,822.44 and 76,066.40

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Solution

The fourth proportional to 139,729.98, 192,822.44 and 76,066.40 is: 104,968.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,729.98 : 192,822.44 = 76,066.40 : x
  2. Step 2: Convert to fraction form
    139,729.98/192,822.44 = 76,066.40/x
  3. Step 3: Cross multiply
    139,729.98x = 192,822.44 × 76,066.40
  4. Step 4: Simplify right side
    139,729.98x = 14,667,308,850.02
  5. Step 5: Solve for x
    x = 14,667,308,850.02/139,729.98
  6. Step 6: Final answer
    x = 104,968.95

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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.