Home / 129,787.44-179,107.29-72,429.33

Finding the Fourth Proportional to 129,787.44, 179,107.29 and 72,429.33

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Solution

The fourth proportional to 129,787.44, 179,107.29 and 72,429.33 is: 99,952.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,787.44 : 179,107.29 = 72,429.33 : x
  2. Step 2: Convert to fraction form
    129,787.44/179,107.29 = 72,429.33/x
  3. Step 3: Cross multiply
    129,787.44x = 179,107.29 × 72,429.33
  4. Step 4: Simplify right side
    129,787.44x = 12,972,621,012.82
  5. Step 5: Solve for x
    x = 12,972,621,012.82/129,787.44
  6. Step 6: Final answer
    x = 99,952.82

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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.