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Finding the Fourth Proportional to 172,632.28, 258,750.78 and 72,642.64

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Solution

The fourth proportional to 172,632.28, 258,750.78 and 72,642.64 is: 108,880.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,632.28 : 258,750.78 = 72,642.64 : x
  2. Step 2: Convert to fraction form
    172,632.28/258,750.78 = 72,642.64/x
  3. Step 3: Cross multiply
    172,632.28x = 258,750.78 × 72,642.64
  4. Step 4: Simplify right side
    172,632.28x = 18,796,339,761.26
  5. Step 5: Solve for x
    x = 18,796,339,761.26/172,632.28
  6. Step 6: Final answer
    x = 108,880.79

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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.