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Finding the Fourth Proportional to 105,571.99, 145,687.55 and 57,173.53

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Solution

The fourth proportional to 105,571.99, 145,687.55 and 57,173.53 is: 78,898.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,571.99 : 145,687.55 = 57,173.53 : x
  2. Step 2: Convert to fraction form
    105,571.99/145,687.55 = 57,173.53/x
  3. Step 3: Cross multiply
    105,571.99x = 145,687.55 × 57,173.53
  4. Step 4: Simplify right side
    105,571.99x = 8,329,471,399.91
  5. Step 5: Solve for x
    x = 8,329,471,399.91/105,571.99
  6. Step 6: Final answer
    x = 78,898.49

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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.