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Finding the Fourth Proportional to 172,113.60, 258,170.40 and 53,821.20

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Solution

The fourth proportional to 172,113.60, 258,170.40 and 53,821.20 is: 80,731.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,113.60 : 258,170.40 = 53,821.20 : x
  2. Step 2: Convert to fraction form
    172,113.60/258,170.40 = 53,821.20/x
  3. Step 3: Cross multiply
    172,113.60x = 258,170.40 × 53,821.20
  4. Step 4: Simplify right side
    172,113.60x = 13,895,040,732.48
  5. Step 5: Solve for x
    x = 13,895,040,732.48/172,113.60
  6. Step 6: Final answer
    x = 80,731.80

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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.