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Finding the Fourth Proportional to 172,557.87, 258,716.72 and 76,442.88

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Solution

The fourth proportional to 172,557.87, 258,716.72 and 76,442.88 is: 114,611.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,557.87 : 258,716.72 = 76,442.88 : x
  2. Step 2: Convert to fraction form
    172,557.87/258,716.72 = 76,442.88/x
  3. Step 3: Cross multiply
    172,557.87x = 258,716.72 × 76,442.88
  4. Step 4: Simplify right side
    172,557.87x = 19,777,050,798.74
  5. Step 5: Solve for x
    x = 19,777,050,798.74/172,557.87
  6. Step 6: Final answer
    x = 114,611.12

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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.