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Finding the Fourth Proportional to 101,928.67, 140,661.01 and 55,989.21

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Solution

The fourth proportional to 101,928.67, 140,661.01 and 55,989.21 is: 77,264.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,928.67 : 140,661.01 = 55,989.21 : x
  2. Step 2: Convert to fraction form
    101,928.67/140,661.01 = 55,989.21/x
  3. Step 3: Cross multiply
    101,928.67x = 140,661.01 × 55,989.21
  4. Step 4: Simplify right side
    101,928.67x = 7,875,498,687.73
  5. Step 5: Solve for x
    x = 7,875,498,687.73/101,928.67
  6. Step 6: Final answer
    x = 77,264.81

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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.