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Finding the Fourth Proportional to 81,745.53, 122,551.47 and 42,313.92

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Solution

The fourth proportional to 81,745.53, 122,551.47 and 42,313.92 is: 63,436.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,745.53 : 122,551.47 = 42,313.92 : x
  2. Step 2: Convert to fraction form
    81,745.53/122,551.47 = 42,313.92/x
  3. Step 3: Cross multiply
    81,745.53x = 122,551.47 × 42,313.92
  4. Step 4: Simplify right side
    81,745.53x = 5,185,633,097.46
  5. Step 5: Solve for x
    x = 5,185,633,097.46/81,745.53
  6. Step 6: Final answer
    x = 63,436.29

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1.5x scale

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.