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Finding the Fourth Proportional to 139,156.61, 208,568.84 and 75,992.63

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Solution

The fourth proportional to 139,156.61, 208,568.84 and 75,992.63 is: 113,898.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,156.61 : 208,568.84 = 75,992.63 : x
  2. Step 2: Convert to fraction form
    139,156.61/208,568.84 = 75,992.63/x
  3. Step 3: Cross multiply
    139,156.61x = 208,568.84 × 75,992.63
  4. Step 4: Simplify right side
    139,156.61x = 15,849,694,687.65
  5. Step 5: Solve for x
    x = 15,849,694,687.65/139,156.61
  6. Step 6: Final answer
    x = 113,898.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.