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Finding the Fourth Proportional to 172,185.54, 258,343.91 and 155,487.78

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Solution

The fourth proportional to 172,185.54, 258,343.91 and 155,487.78 is: 233,290.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,185.54 : 258,343.91 = 155,487.78 : x
  2. Step 2: Convert to fraction form
    172,185.54/258,343.91 = 155,487.78/x
  3. Step 3: Cross multiply
    172,185.54x = 258,343.91 × 155,487.78
  4. Step 4: Simplify right side
    172,185.54x = 40,169,321,042.42
  5. Step 5: Solve for x
    x = 40,169,321,042.42/172,185.54
  6. Step 6: Final answer
    x = 233,290.91

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1.5x scale

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.