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Finding the Fourth Proportional to 172,311.88, 258,342.90 and 53,918.92

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Solution

The fourth proportional to 172,311.88, 258,342.90 and 53,918.92 is: 80,839.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,311.88 : 258,342.90 = 53,918.92 : x
  2. Step 2: Convert to fraction form
    172,311.88/258,342.90 = 53,918.92/x
  3. Step 3: Cross multiply
    172,311.88x = 258,342.90 × 53,918.92
  4. Step 4: Simplify right side
    172,311.88x = 13,929,570,157.67
  5. Step 5: Solve for x
    x = 13,929,570,157.67/172,311.88
  6. Step 6: Final answer
    x = 80,839.29

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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.