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Finding the Fourth Proportional to 259,175.10, 388,628.25 and 118,812.86

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Solution

The fourth proportional to 259,175.10, 388,628.25 and 118,812.86 is: 178,157.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,175.10 : 388,628.25 = 118,812.86 : x
  2. Step 2: Convert to fraction form
    259,175.10/388,628.25 = 118,812.86/x
  3. Step 3: Cross multiply
    259,175.10x = 388,628.25 × 118,812.86
  4. Step 4: Simplify right side
    259,175.10x = 46,174,033,859.30
  5. Step 5: Solve for x
    x = 46,174,033,859.30/259,175.10
  6. Step 6: Final answer
    x = 178,157.68

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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.