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Finding the Fourth Proportional to 188,117.72, 259,605.62 and 103,242.68

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Solution

The fourth proportional to 188,117.72, 259,605.62 and 103,242.68 is: 142,476.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,117.72 : 259,605.62 = 103,242.68 : x
  2. Step 2: Convert to fraction form
    188,117.72/259,605.62 = 103,242.68/x
  3. Step 3: Cross multiply
    188,117.72x = 259,605.62 × 103,242.68
  4. Step 4: Simplify right side
    188,117.72x = 26,802,379,951.86
  5. Step 5: Solve for x
    x = 26,802,379,951.86/188,117.72
  6. Step 6: Final answer
    x = 142,476.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.