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Finding the Fourth Proportional to 139,759.12, 192,866.64 and 76,096.88

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Solution

The fourth proportional to 139,759.12, 192,866.64 and 76,096.88 is: 105,013.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,759.12 : 192,866.64 = 76,096.88 : x
  2. Step 2: Convert to fraction form
    139,759.12/192,866.64 = 76,096.88/x
  3. Step 3: Cross multiply
    139,759.12x = 192,866.64 × 76,096.88
  4. Step 4: Simplify right side
    139,759.12x = 14,676,549,560.08
  5. Step 5: Solve for x
    x = 14,676,549,560.08/139,759.12
  6. Step 6: Final answer
    x = 105,013.18

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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.