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Finding the Fourth Proportional to 139,356.59, 208,961.07 and 55,113.35

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Solution

The fourth proportional to 139,356.59, 208,961.07 and 55,113.35 is: 82,640.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,356.59 : 208,961.07 = 55,113.35 : x
  2. Step 2: Convert to fraction form
    139,356.59/208,961.07 = 55,113.35/x
  3. Step 3: Cross multiply
    139,356.59x = 208,961.07 × 55,113.35
  4. Step 4: Simplify right side
    139,356.59x = 11,516,543,335.80
  5. Step 5: Solve for x
    x = 11,516,543,335.80/139,356.59
  6. Step 6: Final answer
    x = 82,640.83

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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.