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Finding the Fourth Proportional to 135,321.03, 186,736.59 and 74,065.86

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Solution

The fourth proportional to 135,321.03, 186,736.59 and 74,065.86 is: 102,207.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,321.03 : 186,736.59 = 74,065.86 : x
  2. Step 2: Convert to fraction form
    135,321.03/186,736.59 = 74,065.86/x
  3. Step 3: Cross multiply
    135,321.03x = 186,736.59 × 74,065.86
  4. Step 4: Simplify right side
    135,321.03x = 13,830,806,131.82
  5. Step 5: Solve for x
    x = 13,830,806,131.82/135,321.03
  6. Step 6: Final answer
    x = 102,207.37

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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.