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Finding the Fourth Proportional to 169,431.84, 253,982.52 and 80,661.51

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Solution

The fourth proportional to 169,431.84, 253,982.52 and 80,661.51 is: 120,913.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,431.84 : 253,982.52 = 80,661.51 : x
  2. Step 2: Convert to fraction form
    169,431.84/253,982.52 = 80,661.51/x
  3. Step 3: Cross multiply
    169,431.84x = 253,982.52 × 80,661.51
  4. Step 4: Simplify right side
    169,431.84x = 20,486,613,576.81
  5. Step 5: Solve for x
    x = 20,486,613,576.81/169,431.84
  6. Step 6: Final answer
    x = 120,913.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.