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Finding the Fourth Proportional to 139,913.19, 193,080.11 and 76,250.97

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Solution

The fourth proportional to 139,913.19, 193,080.11 and 76,250.97 is: 105,226.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,913.19 : 193,080.11 = 76,250.97 : x
  2. Step 2: Convert to fraction form
    139,913.19/193,080.11 = 76,250.97/x
  3. Step 3: Cross multiply
    139,913.19x = 193,080.11 × 76,250.97
  4. Step 4: Simplify right side
    139,913.19x = 14,722,545,293.95
  5. Step 5: Solve for x
    x = 14,722,545,293.95/139,913.19
  6. Step 6: Final answer
    x = 105,226.29

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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.