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Finding the Fourth Proportional to 144,932.80, 217,399.20 and 81,947.20

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Solution

The fourth proportional to 144,932.80, 217,399.20 and 81,947.20 is: 122,920.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,932.80 : 217,399.20 = 81,947.20 : x
  2. Step 2: Convert to fraction form
    144,932.80/217,399.20 = 81,947.20/x
  3. Step 3: Cross multiply
    144,932.80x = 217,399.20 × 81,947.20
  4. Step 4: Simplify right side
    144,932.80x = 17,815,255,722.24
  5. Step 5: Solve for x
    x = 17,815,255,722.24/144,932.80
  6. Step 6: Final answer
    x = 122,920.80

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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.