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Finding the Fourth Proportional to 139,716.38, 192,808.61 and 76,054.64

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Solution

The fourth proportional to 139,716.38, 192,808.61 and 76,054.64 is: 104,955.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,716.38 : 192,808.61 = 76,054.64 : x
  2. Step 2: Convert to fraction form
    139,716.38/192,808.61 = 76,054.64/x
  3. Step 3: Cross multiply
    139,716.38x = 192,808.61 × 76,054.64
  4. Step 4: Simplify right side
    139,716.38x = 14,663,988,078.13
  5. Step 5: Solve for x
    x = 14,663,988,078.13/139,716.38
  6. Step 6: Final answer
    x = 104,955.40

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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.