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Finding the Fourth Proportional to 139,171.17, 208,794.42 and 99,240.60

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Solution

The fourth proportional to 139,171.17, 208,794.42 and 99,240.60 is: 148,887.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,171.17 : 208,794.42 = 99,240.60 : x
  2. Step 2: Convert to fraction form
    139,171.17/208,794.42 = 99,240.60/x
  3. Step 3: Cross multiply
    139,171.17x = 208,794.42 × 99,240.60
  4. Step 4: Simplify right side
    139,171.17x = 20,720,883,517.45
  5. Step 5: Solve for x
    x = 20,720,883,517.45/139,171.17
  6. Step 6: Final answer
    x = 148,887.76

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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.