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Finding the Fourth Proportional to 188,397.63, 259,988.67 and 103,520.16

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Solution

The fourth proportional to 188,397.63, 259,988.67 and 103,520.16 is: 142,857.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,397.63 : 259,988.67 = 103,520.16 : x
  2. Step 2: Convert to fraction form
    188,397.63/259,988.67 = 103,520.16/x
  3. Step 3: Cross multiply
    188,397.63x = 259,988.67 × 103,520.16
  4. Step 4: Simplify right side
    188,397.63x = 26,914,068,716.59
  5. Step 5: Solve for x
    x = 26,914,068,716.59/188,397.63
  6. Step 6: Final answer
    x = 142,857.79

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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.