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Finding the Fourth Proportional to 188,321.40, 259,885.08 and 103,440.36

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Solution

The fourth proportional to 188,321.40, 259,885.08 and 103,440.36 is: 142,748.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,321.40 : 259,885.08 = 103,440.36 : x
  2. Step 2: Convert to fraction form
    188,321.40/259,885.08 = 103,440.36/x
  3. Step 3: Cross multiply
    188,321.40x = 259,885.08 × 103,440.36
  4. Step 4: Simplify right side
    188,321.40x = 26,882,606,233.83
  5. Step 5: Solve for x
    x = 26,882,606,233.83/188,321.40
  6. Step 6: Final answer
    x = 142,748.55

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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.