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Finding the Fourth Proportional to 77,388.88, 115,933.84 and 57,089.88

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Solution

The fourth proportional to 77,388.88, 115,933.84 and 57,089.88 is: 85,524.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,388.88 : 115,933.84 = 57,089.88 : x
  2. Step 2: Convert to fraction form
    77,388.88/115,933.84 = 57,089.88/x
  3. Step 3: Cross multiply
    77,388.88x = 115,933.84 × 57,089.88
  4. Step 4: Simplify right side
    77,388.88x = 6,618,649,013.54
  5. Step 5: Solve for x
    x = 6,618,649,013.54/77,388.88
  6. Step 6: Final answer
    x = 85,524.55

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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.