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Finding the Fourth Proportional to 139,576.64, 209,242.04 and 55,395.90

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Solution

The fourth proportional to 139,576.64, 209,242.04 and 55,395.90 is: 83,045.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,576.64 : 209,242.04 = 55,395.90 : x
  2. Step 2: Convert to fraction form
    139,576.64/209,242.04 = 55,395.90/x
  3. Step 3: Cross multiply
    139,576.64x = 209,242.04 × 55,395.90
  4. Step 4: Simplify right side
    139,576.64x = 11,591,150,846.66
  5. Step 5: Solve for x
    x = 11,591,150,846.66/139,576.64
  6. Step 6: Final answer
    x = 83,045.07

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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.