Home / 76,388.11-105,415.63-42,396.61

Finding the Fourth Proportional to 76,388.11, 105,415.63 and 42,396.61

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Solution

The fourth proportional to 76,388.11, 105,415.63 and 42,396.61 is: 58,507.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,388.11 : 105,415.63 = 42,396.61 : x
  2. Step 2: Convert to fraction form
    76,388.11/105,415.63 = 42,396.61/x
  3. Step 3: Cross multiply
    76,388.11x = 105,415.63 × 42,396.61
  4. Step 4: Simplify right side
    76,388.11x = 4,469,265,181.14
  5. Step 5: Solve for x
    x = 4,469,265,181.14/76,388.11
  6. Step 6: Final answer
    x = 58,507.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.