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Finding the Fourth Proportional to 203,934.31, 281,437.31 and 139,538.59

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Solution

The fourth proportional to 203,934.31, 281,437.31 and 139,538.59 is: 192,568.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,934.31 : 281,437.31 = 139,538.59 : x
  2. Step 2: Convert to fraction form
    203,934.31/281,437.31 = 139,538.59/x
  3. Step 3: Cross multiply
    203,934.31x = 281,437.31 × 139,538.59
  4. Step 4: Simplify right side
    203,934.31x = 39,271,365,056.05
  5. Step 5: Solve for x
    x = 39,271,365,056.05/203,934.31
  6. Step 6: Final answer
    x = 192,568.70

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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.