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Finding the Fourth Proportional to 144,821.80, 217,074.30 and 51,279.40

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Solution

The fourth proportional to 144,821.80, 217,074.30 and 51,279.40 is: 76,863.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,821.80 : 217,074.30 = 51,279.40 : x
  2. Step 2: Convert to fraction form
    144,821.80/217,074.30 = 51,279.40/x
  3. Step 3: Cross multiply
    144,821.80x = 217,074.30 × 51,279.40
  4. Step 4: Simplify right side
    144,821.80x = 11,131,439,859.42
  5. Step 5: Solve for x
    x = 11,131,439,859.42/144,821.80
  6. Step 6: Final answer
    x = 76,863.01

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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.