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Finding the Fourth Proportional to 139,808.40, 192,935.86 and 76,144.84

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Solution

The fourth proportional to 139,808.40, 192,935.86 and 76,144.84 is: 105,080.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,808.40 : 192,935.86 = 76,144.84 : x
  2. Step 2: Convert to fraction form
    139,808.40/192,935.86 = 76,144.84/x
  3. Step 3: Cross multiply
    139,808.40x = 192,935.86 × 76,144.84
  4. Step 4: Simplify right side
    139,808.40x = 14,691,070,189.96
  5. Step 5: Solve for x
    x = 14,691,070,189.96/139,808.40
  6. Step 6: Final answer
    x = 105,080.03

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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.