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Finding the Fourth Proportional to 135,329.89, 186,749.51 and 74,894.88

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Solution

The fourth proportional to 135,329.89, 186,749.51 and 74,894.88 is: 103,351.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,329.89 : 186,749.51 = 74,894.88 : x
  2. Step 2: Convert to fraction form
    135,329.89/186,749.51 = 74,894.88/x
  3. Step 3: Cross multiply
    135,329.89x = 186,749.51 × 74,894.88
  4. Step 4: Simplify right side
    135,329.89x = 13,986,582,141.51
  5. Step 5: Solve for x
    x = 13,986,582,141.51/135,329.89
  6. Step 6: Final answer
    x = 103,351.76

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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.