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Finding the Fourth Proportional to 172,575.65, 258,376.82 and 91,338.65

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Solution

The fourth proportional to 172,575.65, 258,376.82 and 91,338.65 is: 136,750.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,575.65 : 258,376.82 = 91,338.65 : x
  2. Step 2: Convert to fraction form
    172,575.65/258,376.82 = 91,338.65/x
  3. Step 3: Cross multiply
    172,575.65x = 258,376.82 × 91,338.65
  4. Step 4: Simplify right side
    172,575.65x = 23,599,788,181.52
  5. Step 5: Solve for x
    x = 23,599,788,181.52/172,575.65
  6. Step 6: Final answer
    x = 136,750.40

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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.