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Finding the Fourth Proportional to 139,046.55, 206,780.99 and 134,617.87

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Solution

The fourth proportional to 139,046.55, 206,780.99 and 134,617.87 is: 200,194.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,046.55 : 206,780.99 = 134,617.87 : x
  2. Step 2: Convert to fraction form
    139,046.55/206,780.99 = 134,617.87/x
  3. Step 3: Cross multiply
    139,046.55x = 206,780.99 × 134,617.87
  4. Step 4: Simplify right side
    139,046.55x = 27,836,416,430.29
  5. Step 5: Solve for x
    x = 27,836,416,430.29/139,046.55
  6. Step 6: Final answer
    x = 200,194.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.