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Finding the Fourth Proportional to 139,960.44, 209,825.64 and 55,684.40

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Solution

The fourth proportional to 139,960.44, 209,825.64 and 55,684.40 is: 83,480.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,960.44 : 209,825.64 = 55,684.40 : x
  2. Step 2: Convert to fraction form
    139,960.44/209,825.64 = 55,684.40/x
  3. Step 3: Cross multiply
    139,960.44x = 209,825.64 × 55,684.40
  4. Step 4: Simplify right side
    139,960.44x = 11,684,013,818.89
  5. Step 5: Solve for x
    x = 11,684,013,818.89/139,960.44
  6. Step 6: Final answer
    x = 83,480.83

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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.