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Finding the Fourth Proportional to 139,164.06, 208,735.16 and 39,320.22

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Solution

The fourth proportional to 139,164.06, 208,735.16 and 39,320.22 is: 58,977.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,164.06 : 208,735.16 = 39,320.22 : x
  2. Step 2: Convert to fraction form
    139,164.06/208,735.16 = 39,320.22/x
  3. Step 3: Cross multiply
    139,164.06x = 208,735.16 × 39,320.22
  4. Step 4: Simplify right side
    139,164.06x = 8,207,512,216.33
  5. Step 5: Solve for x
    x = 8,207,512,216.33/139,164.06
  6. Step 6: Final answer
    x = 58,977.24

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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.