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Finding the Fourth Proportional to 115,172.64, 172,772.81 and 108,874.08

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Solution

The fourth proportional to 115,172.64, 172,772.81 and 108,874.08 is: 163,324.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,172.64 : 172,772.81 = 108,874.08 : x
  2. Step 2: Convert to fraction form
    115,172.64/172,772.81 = 108,874.08/x
  3. Step 3: Cross multiply
    115,172.64x = 172,772.81 × 108,874.08
  4. Step 4: Simplify right side
    115,172.64x = 18,810,480,193.39
  5. Step 5: Solve for x
    x = 18,810,480,193.39/115,172.64
  6. Step 6: Final answer
    x = 163,324.21

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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.