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Finding the Fourth Proportional to 139,175.87, 208,602.44 and 64,138.38

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Solution

The fourth proportional to 139,175.87, 208,602.44 and 64,138.38 is: 96,133.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,175.87 : 208,602.44 = 64,138.38 : x
  2. Step 2: Convert to fraction form
    139,175.87/208,602.44 = 64,138.38/x
  3. Step 3: Cross multiply
    139,175.87x = 208,602.44 × 64,138.38
  4. Step 4: Simplify right side
    139,175.87x = 13,379,422,876.60
  5. Step 5: Solve for x
    x = 13,379,422,876.60/139,175.87
  6. Step 6: Final answer
    x = 96,133.21

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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.