Home / 105,716.34-145,890.62-57,969.78

Finding the Fourth Proportional to 105,716.34, 145,890.62 and 57,969.78

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Solution

The fourth proportional to 105,716.34, 145,890.62 and 57,969.78 is: 79,999.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,716.34 : 145,890.62 = 57,969.78 : x
  2. Step 2: Convert to fraction form
    105,716.34/145,890.62 = 57,969.78/x
  3. Step 3: Cross multiply
    105,716.34x = 145,890.62 × 57,969.78
  4. Step 4: Simplify right side
    105,716.34x = 8,457,246,525.91
  5. Step 5: Solve for x
    x = 8,457,246,525.91/105,716.34
  6. Step 6: Final answer
    x = 79,999.43

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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.