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Finding the Fourth Proportional to 172,815.33, 258,989.72 and 89,767.65

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Solution

The fourth proportional to 172,815.33, 258,989.72 and 89,767.65 is: 134,530.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,815.33 : 258,989.72 = 89,767.65 : x
  2. Step 2: Convert to fraction form
    172,815.33/258,989.72 = 89,767.65/x
  3. Step 3: Cross multiply
    172,815.33x = 258,989.72 × 89,767.65
  4. Step 4: Simplify right side
    172,815.33x = 23,248,898,089.72
  5. Step 5: Solve for x
    x = 23,248,898,089.72/172,815.33
  6. Step 6: Final answer
    x = 134,530.30

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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.