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Finding the Fourth Proportional to 172,405.96, 258,608.44 and 54,086.20

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Solution

The fourth proportional to 172,405.96, 258,608.44 and 54,086.20 is: 81,129.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,405.96 : 258,608.44 = 54,086.20 : x
  2. Step 2: Convert to fraction form
    172,405.96/258,608.44 = 54,086.20/x
  3. Step 3: Cross multiply
    172,405.96x = 258,608.44 × 54,086.20
  4. Step 4: Simplify right side
    172,405.96x = 13,987,147,807.53
  5. Step 5: Solve for x
    x = 13,987,147,807.53/172,405.96
  6. Step 6: Final answer
    x = 81,129.14

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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.