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Finding the Fourth Proportional to 172,665.81, 259,033.95 and 72,825.89

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Solution

The fourth proportional to 172,665.81, 259,033.95 and 72,825.89 is: 109,253.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,665.81 : 259,033.95 = 72,825.89 : x
  2. Step 2: Convert to fraction form
    172,665.81/259,033.95 = 72,825.89/x
  3. Step 3: Cross multiply
    172,665.81x = 259,033.95 × 72,825.89
  4. Step 4: Simplify right side
    172,665.81x = 18,864,376,653.80
  5. Step 5: Solve for x
    x = 18,864,376,653.80/172,665.81
  6. Step 6: Final answer
    x = 109,253.69

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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.