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Finding the Fourth Proportional to 139,798.31, 192,927.14 and 79,374.59

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Solution

The fourth proportional to 139,798.31, 192,927.14 and 79,374.59 is: 109,540.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,798.31 : 192,927.14 = 79,374.59 : x
  2. Step 2: Convert to fraction form
    139,798.31/192,927.14 = 79,374.59/x
  3. Step 3: Cross multiply
    139,798.31x = 192,927.14 × 79,374.59
  4. Step 4: Simplify right side
    139,798.31x = 15,313,511,275.86
  5. Step 5: Solve for x
    x = 15,313,511,275.86/139,798.31
  6. Step 6: Final answer
    x = 109,540.04

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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.