Home / 76,388.74-105,417.60-42,399.43

Finding the Fourth Proportional to 76,388.74, 105,417.60 and 42,399.43

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Solution

The fourth proportional to 76,388.74, 105,417.60 and 42,399.43 is: 58,511.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,388.74 : 105,417.60 = 42,399.43 : x
  2. Step 2: Convert to fraction form
    76,388.74/105,417.60 = 42,399.43/x
  3. Step 3: Cross multiply
    76,388.74x = 105,417.60 × 42,399.43
  4. Step 4: Simplify right side
    76,388.74x = 4,469,646,151.97
  5. Step 5: Solve for x
    x = 4,469,646,151.97/76,388.74
  6. Step 6: Final answer
    x = 58,511.85

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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.